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dcm competent e  (New England Biolabs)


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    Structured Review

    New England Biolabs dcm competent e
    Dcm Competent E, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 96/100, based on 291 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/dam+dcm+e+coli/dam-%2Fdcm-+Comp+E%2Ecoli/pmc13095666-263-52-58
    Average 96 stars, based on 291 article reviews
    dcm competent e - by Bioz Stars, 2026-09
    96/100 stars

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    Related Articles

    Sequencing:

    Article Title: FACT weakens the nucleosomal barrier to transcription and preserves its integrity by forming a hexasome-like intermediate.
    Article Snippet: The 5S rRNA DNA template, consisting of a single repeat of the sea urchin L. variegatus 5S NPS (GenBank: V00645.1) flanked by 20 bp of linker DNA on each side, was amplified by PCR from a gBlock (IDT) and cloned into the pGEM-3z/601 vector using BsaI enzyme. .. Plasmids containing either twelve repeats of the 601R sequence or a single copy of the 5S NPS were grown in dam-/dcm- E. coli (NEB) and purified by Maxiprep (Zymo Research). ..

    Purification:

    Article Title: FACT weakens the nucleosomal barrier to transcription and preserves its integrity by forming a hexasome-like intermediate.
    Article Snippet: The 5S rRNA DNA template, consisting of a single repeat of the sea urchin L. variegatus 5S NPS (GenBank: V00645.1) flanked by 20 bp of linker DNA on each side, was amplified by PCR from a gBlock (IDT) and cloned into the pGEM-3z/601 vector using BsaI enzyme. .. Plasmids containing either twelve repeats of the 601R sequence or a single copy of the 5S NPS were grown in dam-/dcm- E. coli (NEB) and purified by Maxiprep (Zymo Research). ..

    Article Title: Information storage across a microbial community using universal RNA barcoding.
    Article Snippet: Gene transfer can be studied using genetically encoded reporters or metagenomic sequencing but these methods are limited by sensitivity when used to monitor the mobile DNA host range in microbial communities.. To record information about gene transfer across a wastewater microbiome, a synthetic catalytic RNA was used to barcode a highly conserved segment of ribosomal RNA (rRNA).. By writing information into rRNA using a ribozyme and reading out native and modified rRNA using amplicon sequencing, we find that microbial community members from 20 taxonomic orders participate in plasmid conjugation with an Escherichia coli donor strain and observe differences in 16S rRNA barcode signal across amplicon sequence variants.

    Article Title: Nucleosome spacing can fine-tune higher-order chromatin assembly.
    Article Snippet: .. Briefly, pWM plasmids containing 12×601 were purified from a 6 L culture of transformed dam–/dcm–E. coli (NEB) using Plasmid Giga Kit (Qiagen). .. The 12×601 arrays were separated from the vector by EcoRV-HF (NEB) digestion.

    Plasmid Preparation:

    Article Title: Information storage across a microbial community using universal RNA barcoding.
    Article Snippet: Gene transfer can be studied using genetically encoded reporters or metagenomic sequencing but these methods are limited by sensitivity when used to monitor the mobile DNA host range in microbial communities.. To record information about gene transfer across a wastewater microbiome, a synthetic catalytic RNA was used to barcode a highly conserved segment of ribosomal RNA (rRNA).. By writing information into rRNA using a ribozyme and reading out native and modified rRNA using amplicon sequencing, we find that microbial community members from 20 taxonomic orders participate in plasmid conjugation with an Escherichia coli donor strain and observe differences in 16S rRNA barcode signal across amplicon sequence variants.

    Article Title: Nucleosome spacing can fine-tune higher-order chromatin assembly.
    Article Snippet: .. Briefly, pWM plasmids containing 12×601 were purified from a 6 L culture of transformed dam–/dcm–E. coli (NEB) using Plasmid Giga Kit (Qiagen). .. The 12×601 arrays were separated from the vector by EcoRV-HF (NEB) digestion.

    Article Title: Development of shuttle vector-based transformation systems for veterinary and zoonotic chlamydiae
    Article Snippet: Vector sequences were confirmed by whole-plasmid sequencing using the Full PlasmidSeq service based on the long-read sequencing technology performed by Microsynth AG (Balgach, Switzerland). .. Unmethylated vector DNA for chlamydial transformation was then produced in dam-/dcm- E. coli (NEB) as recommended ( ). .. Vectors and fluorescent genes used for construction included the following plasmids: pL0M-S-mNeonGreen-EC18153, a gift from Julian Hibberd (Addgene plasmid #137075) , as well as pBOMB4R and pSUmC-4.0, which were kindly provided by Ted Hackstadt from MT, USA ( ) and Kenneth A.

    Incubation:

    Article Title: Information storage across a microbial community using universal RNA barcoding.
    Article Snippet: Gene transfer can be studied using genetically encoded reporters or metagenomic sequencing but these methods are limited by sensitivity when used to monitor the mobile DNA host range in microbial communities.. To record information about gene transfer across a wastewater microbiome, a synthetic catalytic RNA was used to barcode a highly conserved segment of ribosomal RNA (rRNA).. By writing information into rRNA using a ribozyme and reading out native and modified rRNA using amplicon sequencing, we find that microbial community members from 20 taxonomic orders participate in plasmid conjugation with an Escherichia coli donor strain and observe differences in 16S rRNA barcode signal across amplicon sequence variants.

    Transformation Assay:

    Article Title: Nucleosome spacing can fine-tune higher-order chromatin assembly.
    Article Snippet: .. Briefly, pWM plasmids containing 12×601 were purified from a 6 L culture of transformed dam–/dcm–E. coli (NEB) using Plasmid Giga Kit (Qiagen). .. The 12×601 arrays were separated from the vector by EcoRV-HF (NEB) digestion.

    Article Title: Development of shuttle vector-based transformation systems for veterinary and zoonotic chlamydiae
    Article Snippet: Vector sequences were confirmed by whole-plasmid sequencing using the Full PlasmidSeq service based on the long-read sequencing technology performed by Microsynth AG (Balgach, Switzerland). .. Unmethylated vector DNA for chlamydial transformation was then produced in dam-/dcm- E. coli (NEB) as recommended ( ). .. Vectors and fluorescent genes used for construction included the following plasmids: pL0M-S-mNeonGreen-EC18153, a gift from Julian Hibberd (Addgene plasmid #137075) , as well as pBOMB4R and pSUmC-4.0, which were kindly provided by Ted Hackstadt from MT, USA ( ) and Kenneth A.

    Produced:

    Article Title: Development of shuttle vector-based transformation systems for veterinary and zoonotic chlamydiae
    Article Snippet: Vector sequences were confirmed by whole-plasmid sequencing using the Full PlasmidSeq service based on the long-read sequencing technology performed by Microsynth AG (Balgach, Switzerland). .. Unmethylated vector DNA for chlamydial transformation was then produced in dam-/dcm- E. coli (NEB) as recommended ( ). .. Vectors and fluorescent genes used for construction included the following plasmids: pL0M-S-mNeonGreen-EC18153, a gift from Julian Hibberd (Addgene plasmid #137075) , as well as pBOMB4R and pSUmC-4.0, which were kindly provided by Ted Hackstadt from MT, USA ( ) and Kenneth A.

    Passaging:

    Article Title: Structural and functional analysis of Bacillus cereus spore cortex lytic enzymes and YlaJ/YhcN lipoproteins
    Article Snippet: .. Verified pMAD plasmids were demethylated by passaging through dam-/dcm- E. coli (New England Biolabs, UK) before introducing to B. cereus by electroporation and selecting for transformants on LB plates supplemented with 1 μg ml −1 erythromycin, 5 μg ml −1 lincomycin and 90 μg ml −1 X-gal. .. Efficient electroporation was achieved using a Gene Pulser instrument (Bio-Rad) operating at 200 Ω, 2 kV and 25 μF with cuvettes that contained 500 ng of plasmid DNA plus 50 μl of thawed electrocompetent cells.

    Electroporation:

    Article Title: Structural and functional analysis of Bacillus cereus spore cortex lytic enzymes and YlaJ/YhcN lipoproteins
    Article Snippet: .. Verified pMAD plasmids were demethylated by passaging through dam-/dcm- E. coli (New England Biolabs, UK) before introducing to B. cereus by electroporation and selecting for transformants on LB plates supplemented with 1 μg ml −1 erythromycin, 5 μg ml −1 lincomycin and 90 μg ml −1 X-gal. .. Efficient electroporation was achieved using a Gene Pulser instrument (Bio-Rad) operating at 200 Ω, 2 kV and 25 μF with cuvettes that contained 500 ng of plasmid DNA plus 50 μl of thawed electrocompetent cells.

    other:

    Article Title: C. elegans astrocytes mature in two phases from lineally distinct progenitors through CEH-43/DLX-mediated convergent transcription
    Article Snippet: To prepare animals for NanoDam profiling, strains carrying the NanoDam transgene alone or together with an endogenously GFP-tagged CEH-43 were maintained on dam–/dcm– E. coli (NEB C2925) for at least three generations without starvation.



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    Effect of plasmid source on the electroporation efficiency of Halomonas elongata DSM 2581. (a) Electroporation efficiencies of pSEVA241 purified from either <t>E.</t> <t>coli</t> 10‐beta (NEB) or H. elongata DSM 2581. (b) Electroporation efficiencies of pSEVA231 purified from either E. coli 10‐beta (NEB), E. coli <t>C2925</t> (NEB) or H. elongata DSM 2581. Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA241 (a) or pSEVA231 (b) (* p < 0.05; *** p < 0.001; **** p < 0.0001).
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    New England Biolabs dam dcm e coli
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    ( A-C ) Effect of buffer, voltage, and waveform on transformation efficiency (TE) in three Gram-negative bacteria. Data are the average of two biological replicates. ( A ) TE using four buffers: water, 25% sorbitol, 10% or 15% glycerol, and 25% sucrose. Data shown was electroporated at 3 kV using exponential decay (see additional voltages in Supplementary Figure 3). ( B ) TE using a range of electroporation voltages: 0.5-3 kV. Cells were washed with 10% glycerol ( <t>E.</t> <t>coli</t> ), 25% sorbitol ( S. amazonensis ), and 15% glycerol ( P. alcaliphila ), and electroporated using exponential decay waveform. Error bars represent standard error. ( C ) Comparison of TE using square or exponential decay waveforms. Data are results for all voltages and buffers tested in panel B. ( D ) Final parameter selection for 24-condition electroporation screen including four buffers, three voltages and two waveforms. ( E-F ) TE following the 24-condition electroporation screen performed on seven bacteria with a single plasmid using ( E ) exponential decay (EX) and ( F ) square (SQ) waveforms. Data are the average of two biological replicates, except P. sakaiensis and C. necator which are a single replicate.
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    Effect of plasmid source on the electroporation efficiency of Halomonas elongata DSM 2581. (a) Electroporation efficiencies of pSEVA241 purified from either E. coli 10‐beta (NEB) or H. elongata DSM 2581. (b) Electroporation efficiencies of pSEVA231 purified from either E. coli 10‐beta (NEB), E. coli C2925 (NEB) or H. elongata DSM 2581. Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA241 (a) or pSEVA231 (b) (* p < 0.05; *** p < 0.001; **** p < 0.0001).

    Journal: Microbial Biotechnology

    Article Title: Developing High‐Efficiency Electroporation Protocols for Hard‐To‐Transform Halomonas spp.

    doi: 10.1111/1751-7915.70285

    Figure Lengend Snippet: Effect of plasmid source on the electroporation efficiency of Halomonas elongata DSM 2581. (a) Electroporation efficiencies of pSEVA241 purified from either E. coli 10‐beta (NEB) or H. elongata DSM 2581. (b) Electroporation efficiencies of pSEVA231 purified from either E. coli 10‐beta (NEB), E. coli C2925 (NEB) or H. elongata DSM 2581. Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA241 (a) or pSEVA231 (b) (* p < 0.05; *** p < 0.001; **** p < 0.0001).

    Article Snippet: Escherichia coli 10‐beta and E. coli C2925 ( dam − , dcm − ) were sourced from New England Biolabs (NEB).

    Techniques: Plasmid Preparation, Electroporation, Purification, Standard Deviation, Negative Control

    Electroporation of Halomonas boliviensis LC1 and Halomonas campaniensis LS21. Electroporation efficiencies of H. boliviensis LC1 and H. campaniensis LS21 transformed with pSEVA231 purified from either E. coli C2925 (NEB) (a) Comparison of electroporation efficiencies from electrocompetent cells prepared from cultures grown in LB medium containing different concentrations of NaCl: 6% vs. 1%. (b) Comparison of electroporation efficiencies using two different electroporator systems—Bio‐Rad MicroPulser vs. Bio‐Rad Gene Pulser—under varying electroporation conditions: Voltage, pulse number and resistance. Parameters for conditions C1, C4, C6 and C7 are detailed in Figure . Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA231. (*** p < 0.001; **** p < 0.0001)

    Journal: Microbial Biotechnology

    Article Title: Developing High‐Efficiency Electroporation Protocols for Hard‐To‐Transform Halomonas spp.

    doi: 10.1111/1751-7915.70285

    Figure Lengend Snippet: Electroporation of Halomonas boliviensis LC1 and Halomonas campaniensis LS21. Electroporation efficiencies of H. boliviensis LC1 and H. campaniensis LS21 transformed with pSEVA231 purified from either E. coli C2925 (NEB) (a) Comparison of electroporation efficiencies from electrocompetent cells prepared from cultures grown in LB medium containing different concentrations of NaCl: 6% vs. 1%. (b) Comparison of electroporation efficiencies using two different electroporator systems—Bio‐Rad MicroPulser vs. Bio‐Rad Gene Pulser—under varying electroporation conditions: Voltage, pulse number and resistance. Parameters for conditions C1, C4, C6 and C7 are detailed in Figure . Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA231. (*** p < 0.001; **** p < 0.0001)

    Article Snippet: Escherichia coli 10‐beta and E. coli C2925 ( dam − , dcm − ) were sourced from New England Biolabs (NEB).

    Techniques: Electroporation, Transformation Assay, Purification, Comparison, Standard Deviation, Negative Control, Plasmid Preparation

    Effect of plasmid source on the electroporation efficiency of Halomonas elongata DSM 2581. (a) Electroporation efficiencies of pSEVA241 purified from either E. coli 10‐beta (NEB) or H. elongata DSM 2581. (b) Electroporation efficiencies of pSEVA231 purified from either E. coli 10‐beta (NEB), E. coli C2925 (NEB) or H. elongata DSM 2581. Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA241 (a) or pSEVA231 (b) (* p < 0.05; *** p < 0.001; **** p < 0.0001).

    Journal: Microbial Biotechnology

    Article Title: Developing High‐Efficiency Electroporation Protocols for Hard‐To‐Transform Halomonas spp.

    doi: 10.1111/1751-7915.70285

    Figure Lengend Snippet: Effect of plasmid source on the electroporation efficiency of Halomonas elongata DSM 2581. (a) Electroporation efficiencies of pSEVA241 purified from either E. coli 10‐beta (NEB) or H. elongata DSM 2581. (b) Electroporation efficiencies of pSEVA231 purified from either E. coli 10‐beta (NEB), E. coli C2925 (NEB) or H. elongata DSM 2581. Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA241 (a) or pSEVA231 (b) (* p < 0.05; *** p < 0.001; **** p < 0.0001).

    Article Snippet: Following this approach, we tested electroporating H. elongata with plasmids purified from the dam − / dcm − E. coli C2925 (NEB).

    Techniques: Plasmid Preparation, Electroporation, Purification, Standard Deviation, Negative Control

    Electroporation of Halomonas boliviensis LC1 and Halomonas campaniensis LS21. Electroporation efficiencies of H. boliviensis LC1 and H. campaniensis LS21 transformed with pSEVA231 purified from either E. coli C2925 (NEB) (a) Comparison of electroporation efficiencies from electrocompetent cells prepared from cultures grown in LB medium containing different concentrations of NaCl: 6% vs. 1%. (b) Comparison of electroporation efficiencies using two different electroporator systems—Bio‐Rad MicroPulser vs. Bio‐Rad Gene Pulser—under varying electroporation conditions: Voltage, pulse number and resistance. Parameters for conditions C1, C4, C6 and C7 are detailed in Figure . Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA231. (*** p < 0.001; **** p < 0.0001)

    Journal: Microbial Biotechnology

    Article Title: Developing High‐Efficiency Electroporation Protocols for Hard‐To‐Transform Halomonas spp.

    doi: 10.1111/1751-7915.70285

    Figure Lengend Snippet: Electroporation of Halomonas boliviensis LC1 and Halomonas campaniensis LS21. Electroporation efficiencies of H. boliviensis LC1 and H. campaniensis LS21 transformed with pSEVA231 purified from either E. coli C2925 (NEB) (a) Comparison of electroporation efficiencies from electrocompetent cells prepared from cultures grown in LB medium containing different concentrations of NaCl: 6% vs. 1%. (b) Comparison of electroporation efficiencies using two different electroporator systems—Bio‐Rad MicroPulser vs. Bio‐Rad Gene Pulser—under varying electroporation conditions: Voltage, pulse number and resistance. Parameters for conditions C1, C4, C6 and C7 are detailed in Figure . Data shown represent mean ± standard deviation from three biological replicates. Negative control experiments were performed by electroporating electrocompetent cells without the addition of plasmid pSEVA231. (*** p < 0.001; **** p < 0.0001)

    Article Snippet: Following this approach, we tested electroporating H. elongata with plasmids purified from the dam − / dcm − E. coli C2925 (NEB).

    Techniques: Electroporation, Transformation Assay, Purification, Comparison, Standard Deviation, Negative Control, Plasmid Preparation

    ( A-C ) Effect of buffer, voltage, and waveform on transformation efficiency (TE) in three Gram-negative bacteria. Data are the average of two biological replicates. ( A ) TE using four buffers: water, 25% sorbitol, 10% or 15% glycerol, and 25% sucrose. Data shown was electroporated at 3 kV using exponential decay (see additional voltages in Supplementary Figure 3). ( B ) TE using a range of electroporation voltages: 0.5-3 kV. Cells were washed with 10% glycerol ( E. coli ), 25% sorbitol ( S. amazonensis ), and 15% glycerol ( P. alcaliphila ), and electroporated using exponential decay waveform. Error bars represent standard error. ( C ) Comparison of TE using square or exponential decay waveforms. Data are results for all voltages and buffers tested in panel B. ( D ) Final parameter selection for 24-condition electroporation screen including four buffers, three voltages and two waveforms. ( E-F ) TE following the 24-condition electroporation screen performed on seven bacteria with a single plasmid using ( E ) exponential decay (EX) and ( F ) square (SQ) waveforms. Data are the average of two biological replicates, except P. sakaiensis and C. necator which are a single replicate.

    Journal: bioRxiv

    Article Title: Active learning guides automated discovery of DNA delivery via electroporation for non-model microbes

    doi: 10.1101/2025.11.18.689155

    Figure Lengend Snippet: ( A-C ) Effect of buffer, voltage, and waveform on transformation efficiency (TE) in three Gram-negative bacteria. Data are the average of two biological replicates. ( A ) TE using four buffers: water, 25% sorbitol, 10% or 15% glycerol, and 25% sucrose. Data shown was electroporated at 3 kV using exponential decay (see additional voltages in Supplementary Figure 3). ( B ) TE using a range of electroporation voltages: 0.5-3 kV. Cells were washed with 10% glycerol ( E. coli ), 25% sorbitol ( S. amazonensis ), and 15% glycerol ( P. alcaliphila ), and electroporated using exponential decay waveform. Error bars represent standard error. ( C ) Comparison of TE using square or exponential decay waveforms. Data are results for all voltages and buffers tested in panel B. ( D ) Final parameter selection for 24-condition electroporation screen including four buffers, three voltages and two waveforms. ( E-F ) TE following the 24-condition electroporation screen performed on seven bacteria with a single plasmid using ( E ) exponential decay (EX) and ( F ) square (SQ) waveforms. Data are the average of two biological replicates, except P. sakaiensis and C. necator which are a single replicate.

    Article Snippet: Individual pGL2 plasmids ( Supplementary Table 1 ) were stored in TransforMax EC100D pir-116 cells (Biosearch Technologies); pAKgfp1-kan was stored in dam–/dcm– E. coli (New England Biolabs).

    Techniques: Transformation Assay, Bacteria, Electroporation, Comparison, Selection, Plasmid Preparation

    ( A-C ) Effect of buffer, voltage, and waveform on transformation efficiency (TE) in three Gram-negative bacteria. Data are the average of two biological replicates. ( A ) TE using four buffers: water, 25% sorbitol, 10% or 15% glycerol, and 25% sucrose. Data shown was electroporated at 3 kV using exponential decay (see additional voltages in Supplementary Figure 3). ( B ) TE using a range of electroporation voltages: 0.5-3 kV. Cells were washed with 10% glycerol ( E. coli ), 25% sorbitol ( S. amazonensis ), and 15% glycerol ( P. alcaliphila ), and electroporated using exponential decay waveform. Error bars represent standard error. ( C ) Comparison of TE using square or exponential decay waveforms. Data are results for all voltages and buffers tested in panel B. ( D ) Final parameter selection for 24-condition electroporation screen including four buffers, three voltages and two waveforms. ( E-F ) TE following the 24-condition electroporation screen performed on seven bacteria with a single plasmid using ( E ) exponential decay (EX) and ( F ) square (SQ) waveforms. Data are the average of two biological replicates, except P. sakaiensis and C. necator which are a single replicate.

    Journal: bioRxiv

    Article Title: Active learning guides automated discovery of DNA delivery via electroporation for non-model microbes

    doi: 10.1101/2025.11.18.689155

    Figure Lengend Snippet: ( A-C ) Effect of buffer, voltage, and waveform on transformation efficiency (TE) in three Gram-negative bacteria. Data are the average of two biological replicates. ( A ) TE using four buffers: water, 25% sorbitol, 10% or 15% glycerol, and 25% sucrose. Data shown was electroporated at 3 kV using exponential decay (see additional voltages in Supplementary Figure 3). ( B ) TE using a range of electroporation voltages: 0.5-3 kV. Cells were washed with 10% glycerol ( E. coli ), 25% sorbitol ( S. amazonensis ), and 15% glycerol ( P. alcaliphila ), and electroporated using exponential decay waveform. Error bars represent standard error. ( C ) Comparison of TE using square or exponential decay waveforms. Data are results for all voltages and buffers tested in panel B. ( D ) Final parameter selection for 24-condition electroporation screen including four buffers, three voltages and two waveforms. ( E-F ) TE following the 24-condition electroporation screen performed on seven bacteria with a single plasmid using ( E ) exponential decay (EX) and ( F ) square (SQ) waveforms. Data are the average of two biological replicates, except P. sakaiensis and C. necator which are a single replicate.

    Article Snippet: The plasmid was then transformed into dam–/dcm– electrocompetent E. coli (New England Biolabs) according to the manufacturer’s instructions, extracted and sequence verified by Eton Bioscience (Boston, MA).

    Techniques: Transformation Assay, Bacteria, Electroporation, Comparison, Selection, Plasmid Preparation