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qiagen p2 lysis buffer  (Qiagen)


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    Structured Review

    Qiagen qiagen p2 lysis buffer
    Qiagen P2 Lysis Buffer, supplied by Qiagen, used in various techniques. Bioz Stars score: 95/100, based on 226 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/buffers+p2/Buffer+P2/pmc12996797-137-6-10
    Average 95 stars, based on 226 article reviews
    qiagen p2 lysis buffer - by Bioz Stars, 2026-09
    95/100 stars

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    Related Articles

    Centrifugation:

    Article Title: Determinants of Ligand-Functionalized DNA Nanostructure-Cell Interactions.
    Article Snippet: .. The cells were pelleted by centrifugation, and the bacteriophages were extracted from the supernatant by PEG fractionation.63 After centrifugation, the pellet was reconstituted in TE buffer (10 mM Tris, 1 mM EDTA, pH 8.5) and lysed using buffers P2 and P3 (Qiagen). .. After ethanol precipitation, the single-stranded phage DNA was reconstituted in TE buffer and stored at −30 °C in DNA LoBind tubes (Eppendorf).

    Article Title: Incorporation of native antibodies and Fc-fusion proteins on DNA nanostructures via a modular conjugation strategy †Electronic supplementary information (ESI) available: Experimental methods, DNA origami design, DNA sequences, and additional experimental data. See DOI: 10.1039/c7cc04178k
    Article Snippet: 8 Folding and purification of DNA origami nanostructures The 7,249 nt single-stranded scaffold strand was produced as described in literature.5 In short, M13mp18 phage recombinant form I double-stranded DNA (New England Biolabs) was transformed in E. coli XL-1 Blue competent cells (Agilent) and grown overnight at 37°C on agar plates supplemented with tetracycline (10 μg/mL, Sigma Aldrich), β-D-1-thiogalactopyranoside (IPTG, 240 μg/mL, Applichem), and 5-bromo-4chloro-3-indolyl-β-D-galactopyranoside (X-gal, 200 μg/mL, Serva), according to the manufacturer’s protocol. .. After centrifugation the pellet was reconstituted in TE buffer (10 mM Tris, 1 mM EDTA, pH 8.5) and lysed as described5 using buffers P2 and P3 (Qiagen). .. After ethanol precipitation, the single-stranded phage DNA was reconstituted in TE buffer and stored at -30°C in DNA LoBind tubes (Eppendorf).

    Article Title: Determinants of Ligand-Functionalized DNA Nanostructure–Cell Interactions
    Article Snippet: .. The cells were pelleted by centrifugation, and the bacteriophages were extracted from the supernatant by PEG fractionation.63 After centrifugation, the pellet was reconstituted in TE buffer (10 mM Tris, 1 mM EDTA, pH 8.5) and lysed using buffers P2 and P3 (Qiagen). .. After ethanol precipitation, the single-stranded phage DNA was reconstituted in TE buffer and stored at −30 °C in DNA LoBind tubes (Eppendorf).

    Fractionation:

    Article Title: Determinants of Ligand-Functionalized DNA Nanostructure-Cell Interactions.
    Article Snippet: .. The cells were pelleted by centrifugation, and the bacteriophages were extracted from the supernatant by PEG fractionation.63 After centrifugation, the pellet was reconstituted in TE buffer (10 mM Tris, 1 mM EDTA, pH 8.5) and lysed using buffers P2 and P3 (Qiagen). .. After ethanol precipitation, the single-stranded phage DNA was reconstituted in TE buffer and stored at −30 °C in DNA LoBind tubes (Eppendorf).

    Article Title: Determinants of Ligand-Functionalized DNA Nanostructure–Cell Interactions
    Article Snippet: .. The cells were pelleted by centrifugation, and the bacteriophages were extracted from the supernatant by PEG fractionation.63 After centrifugation, the pellet was reconstituted in TE buffer (10 mM Tris, 1 mM EDTA, pH 8.5) and lysed using buffers P2 and P3 (Qiagen). .. After ethanol precipitation, the single-stranded phage DNA was reconstituted in TE buffer and stored at −30 °C in DNA LoBind tubes (Eppendorf).

    other:

    Article Title: Harmonious genetic combinations rewire regulatory networks and flip gene essentiality
    Article Snippet: To isolate plasmids, we used a simple alkaline lysis miniprep protocol using buffers P1, P2, and P3 from Qiagen (catalog numbers 19051,19052, and 19053 respectively), either at a “normal” scale, with 1.5 ml of saturated bacterial culture yielding > 10 mg of DNA or scaled-down in a 96-well plate with yields of >1 mg plasmid DNA per sample.

    Article Title: Harmonious genetic combinations rewire regulatory networks and flip gene essentiality
    Article Snippet: To isolate plasmids, we used a simple alkaline lysis miniprep protocol using buffers P1, P2 and P3 from Qiagen (catalog numbers 19051,19052 and 19053 respectively), either at a “normal” scale, with 1.5 ml of saturated bacterial culture yielding > 10 mg of DNA or scaled-down in a 96-well plate with yields of >1 mg plasmid DNA per sample.

    Ethanol Precipitation:

    Article Title: Rapid Detection of Vibrio vulnificus in Shellfish and Gulf of Mexico Water by Real-Time PCR
    Article Snippet: Boiling with Instagene (Bio-Rad) , Incubate at 56°C for 20 min, followed by boiling for 10 min , ≥10 2. .. Qiaprep (Qiagen, Valencia, Calif.) , Bacterial pellet resuspended in buffer P1; buffers P2 and N3 added; ethanol precipitation , ≥10 7. .. Magnetic Beads (Bugs n' Beads, Genpoint, Oslo, Norway) , Incubate with binding beads; lysis buffer added; ethanol precipitation , ND.



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    Potential mechanisms for infected cell resistance to CTL-mediated lysis. <t>CD4</t> + T cells exhibit stable differences in susceptibility to lysis (A and B). If resistance is associated with properties that allow preferential infection, then infected cells may show greater resistance than uninfected cells (A). Alternatively, intrinsically susceptible cells may be eliminated over time, with death-resistant HIV-1-harboring cells remaining (B). A third possibility (C) is that HIV-1 induces phenotypic changes that increase cell death resistance of infected cells (HIV-induced resistance).
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    Potential mechanisms for infected cell resistance to CTL-mediated lysis. CD4 + T cells exhibit stable differences in susceptibility to lysis (A and B). If resistance is associated with properties that allow preferential infection, then infected cells may show greater resistance than uninfected cells (A). Alternatively, intrinsically susceptible cells may be eliminated over time, with death-resistant HIV-1-harboring cells remaining (B). A third possibility (C) is that HIV-1 induces phenotypic changes that increase cell death resistance of infected cells (HIV-induced resistance).

    Journal: bioRxiv

    Article Title: HIV-1 infection does not confer intrinsic resistance to cell death induced by cytotoxic T lymphocytes

    doi: 10.64898/2026.03.23.713717

    Figure Lengend Snippet: Potential mechanisms for infected cell resistance to CTL-mediated lysis. CD4 + T cells exhibit stable differences in susceptibility to lysis (A and B). If resistance is associated with properties that allow preferential infection, then infected cells may show greater resistance than uninfected cells (A). Alternatively, intrinsically susceptible cells may be eliminated over time, with death-resistant HIV-1-harboring cells remaining (B). A third possibility (C) is that HIV-1 induces phenotypic changes that increase cell death resistance of infected cells (HIV-induced resistance).

    Article Snippet: To quantify the frequency of intact provirus before and after co-cultures, viable CD4 + T cells were isolated using the Milteniy Dead Cell Removal kit (Cat. No# 130-090-101) and the StemCell EasySep Human CD4 + T cell Enrichment kit (Cat. No# 19052), and genomic DNA was isolated with the Qiagen QIAamp DNA Micro kit (Cat. No# 56304) and used in the IPDA as previously described ( ).

    Techniques: Infection, Lysis

    Experimental method to assess resistance to CTL-mediated killing. (A) Co-culture setup: primary CD4 + T cells from PLWH are pulsed with mutant p53 peptide and cultured with autologous, pre-expanded CD8 + T cells and p53-specific scDb. IPDA is performed on the viable CD4 + T cell population isolated before and after the co-culture to assess for enrichment of infected cells, indicative of resistance. (B) scDb mechanism of action: scDbs bind to cognate peptide:MHC complexes on the target cell surface and also to the CD3ε subunit of the TCR complex to induce localized cytotoxicity. (C) Flow cytometry gating strategy to determine frequency of viable target cells. (D) Representative histograms of co-cultures with and without scDbs. The reduction in the viable CD4 + T cell count (marked region) was used to determine the amount of CTL-mediated lysis. I Representative viability data for study participant OM5418 for the experimental condition and seven control conditions.

    Journal: bioRxiv

    Article Title: HIV-1 infection does not confer intrinsic resistance to cell death induced by cytotoxic T lymphocytes

    doi: 10.64898/2026.03.23.713717

    Figure Lengend Snippet: Experimental method to assess resistance to CTL-mediated killing. (A) Co-culture setup: primary CD4 + T cells from PLWH are pulsed with mutant p53 peptide and cultured with autologous, pre-expanded CD8 + T cells and p53-specific scDb. IPDA is performed on the viable CD4 + T cell population isolated before and after the co-culture to assess for enrichment of infected cells, indicative of resistance. (B) scDb mechanism of action: scDbs bind to cognate peptide:MHC complexes on the target cell surface and also to the CD3ε subunit of the TCR complex to induce localized cytotoxicity. (C) Flow cytometry gating strategy to determine frequency of viable target cells. (D) Representative histograms of co-cultures with and without scDbs. The reduction in the viable CD4 + T cell count (marked region) was used to determine the amount of CTL-mediated lysis. I Representative viability data for study participant OM5418 for the experimental condition and seven control conditions.

    Article Snippet: To quantify the frequency of intact provirus before and after co-cultures, viable CD4 + T cells were isolated using the Milteniy Dead Cell Removal kit (Cat. No# 130-090-101) and the StemCell EasySep Human CD4 + T cell Enrichment kit (Cat. No# 19052), and genomic DNA was isolated with the Qiagen QIAamp DNA Micro kit (Cat. No# 56304) and used in the IPDA as previously described ( ).

    Techniques: Co-Culture Assay, Mutagenesis, Cell Culture, Isolation, Infection, Flow Cytometry, Cell Characterization, Lysis, Control

    Ex vivo co-cultures with cells from PLWH do not show enrichment for infected cells in 10/12 participants. (A) Representative ddPCR plots of IPDA performed on CD4 + T cells from donor CIRC0226 before and after co-culture. Each dot represents one droplet out of at least 10,000 droplets measured per assay. Measured frequencies were corrected for cell count and DNA shearing as described previously . (B) Pre- and post-culture frequency of intact provirus per 1x10 6 CD4 + T cells. Each point represents the calculated frequency of intact provirus for one assay for the indicated study participant. (C) Violin plot of enrichment for total study cohort. Each dot represents the average enrichment score for an individual study participant. Colors and symbols coding as in (B). Dashed line marks no change in frequency; horizontal lines mark the median and first and third quartile. (D) Correlation between extent of killing and enrichment for intact proviruses. (E) Correlation between time on ART and enrichment of intact provirus. (F) Comparison of enrichment of intact provirus between study participants with less than 10 years of continuous ART (short-term) and over 13 years of continuous ART (long-term).

    Journal: bioRxiv

    Article Title: HIV-1 infection does not confer intrinsic resistance to cell death induced by cytotoxic T lymphocytes

    doi: 10.64898/2026.03.23.713717

    Figure Lengend Snippet: Ex vivo co-cultures with cells from PLWH do not show enrichment for infected cells in 10/12 participants. (A) Representative ddPCR plots of IPDA performed on CD4 + T cells from donor CIRC0226 before and after co-culture. Each dot represents one droplet out of at least 10,000 droplets measured per assay. Measured frequencies were corrected for cell count and DNA shearing as described previously . (B) Pre- and post-culture frequency of intact provirus per 1x10 6 CD4 + T cells. Each point represents the calculated frequency of intact provirus for one assay for the indicated study participant. (C) Violin plot of enrichment for total study cohort. Each dot represents the average enrichment score for an individual study participant. Colors and symbols coding as in (B). Dashed line marks no change in frequency; horizontal lines mark the median and first and third quartile. (D) Correlation between extent of killing and enrichment for intact proviruses. (E) Correlation between time on ART and enrichment of intact provirus. (F) Comparison of enrichment of intact provirus between study participants with less than 10 years of continuous ART (short-term) and over 13 years of continuous ART (long-term).

    Article Snippet: To quantify the frequency of intact provirus before and after co-cultures, viable CD4 + T cells were isolated using the Milteniy Dead Cell Removal kit (Cat. No# 130-090-101) and the StemCell EasySep Human CD4 + T cell Enrichment kit (Cat. No# 19052), and genomic DNA was isolated with the Qiagen QIAamp DNA Micro kit (Cat. No# 56304) and used in the IPDA as previously described ( ).

    Techniques: Ex Vivo, Infection, Co-Culture Assay, Cell Characterization, Comparison

    pMHC-specific latency reversal by the p53-specific scDb. (A) Frequencies of CD69 + CD4 + T cells in individual co-cultures without and with scDb across at least two co-cultures for all twelve study participants. Co-cultures were set up as described in . Error bars represent standard deviation. (B) Induction of viral RNA by the p53-specific scDb. Primary CD4 + T cells from HIV-1-positive study participants were pulsed with the p53 R175H peptide (n = 3) or an irrelevant control peptide (HLA-A2 signal peptide, VMAPRTLVL; n = 1) and cultured for 18 hours with or without p53-specific scDb. RNA was isolated and reverse transcribed. Digital PCR was performed with probes binding to poly-adenylated HIV-1 RNA (poly-A), the integrase region of HIV-1 pol (int) or the splice junction for vpu-env mRNA. (C-E) pMHC-specific increase in HIV-1 transcripts induced by the p53-specific scDb. Measurements were averaged over two technical replicates for each of three identical culture wells per condition, and normalized to transcript level in the no treatment (NT) control. PMA/ionomycin was included as positive control. Colors represent treatment conditions: black: no treatment; red: p53-specific scDb; green: PMA/I. NC: non-cognate peptide (HLA-A2 signal peptide SP-2A, VMAPRTLVL), C: cognate peptide (p53 R175H , HMTEVVRHC).

    Journal: bioRxiv

    Article Title: HIV-1 infection does not confer intrinsic resistance to cell death induced by cytotoxic T lymphocytes

    doi: 10.64898/2026.03.23.713717

    Figure Lengend Snippet: pMHC-specific latency reversal by the p53-specific scDb. (A) Frequencies of CD69 + CD4 + T cells in individual co-cultures without and with scDb across at least two co-cultures for all twelve study participants. Co-cultures were set up as described in . Error bars represent standard deviation. (B) Induction of viral RNA by the p53-specific scDb. Primary CD4 + T cells from HIV-1-positive study participants were pulsed with the p53 R175H peptide (n = 3) or an irrelevant control peptide (HLA-A2 signal peptide, VMAPRTLVL; n = 1) and cultured for 18 hours with or without p53-specific scDb. RNA was isolated and reverse transcribed. Digital PCR was performed with probes binding to poly-adenylated HIV-1 RNA (poly-A), the integrase region of HIV-1 pol (int) or the splice junction for vpu-env mRNA. (C-E) pMHC-specific increase in HIV-1 transcripts induced by the p53-specific scDb. Measurements were averaged over two technical replicates for each of three identical culture wells per condition, and normalized to transcript level in the no treatment (NT) control. PMA/ionomycin was included as positive control. Colors represent treatment conditions: black: no treatment; red: p53-specific scDb; green: PMA/I. NC: non-cognate peptide (HLA-A2 signal peptide SP-2A, VMAPRTLVL), C: cognate peptide (p53 R175H , HMTEVVRHC).

    Article Snippet: To quantify the frequency of intact provirus before and after co-cultures, viable CD4 + T cells were isolated using the Milteniy Dead Cell Removal kit (Cat. No# 130-090-101) and the StemCell EasySep Human CD4 + T cell Enrichment kit (Cat. No# 19052), and genomic DNA was isolated with the Qiagen QIAamp DNA Micro kit (Cat. No# 56304) and used in the IPDA as previously described ( ).

    Techniques: Standard Deviation, Control, Cell Culture, Isolation, Reverse Transcription, Digital PCR, Binding Assay, Positive Control

    Effect of active viral expression on cell death resistance. (A) Experimental setup: Healthy donor CD4 + T cells were activated for 72 hours with PHA and infected with different HIV-1 GFP-reporter constructs. Cells were then pulsed with exogenous p53 R175H peptide and co-cultured with pre-expanded autologous CD8 + T cells and p53-specific scDb or irrelevant control scDb. Viability and GFP-expression were analyzed through flow cytometry. (B) Genome maps of the HIV-1 reporter constructs used to infect target cells. Each row represents one reading frame. Striped segments indicate gene segments that are no longer translated due to insertion of a STOP-codon. (C) Representative flow plot showing viable uninfected (GFP-negative) and HIV-1-expressing (GFP-positive) cell populations. (D) Viability of uninfected target cells or cells infected with indicated HIV-1 reporter constructs after co-culture with the HLA-A2:p53 R175H -restricted scDb. Each dot shows the average of three technical replicates per condition. Symbols represent individual donors; assay was performed 2 independent times for each of the n=5 healthy donors, except for the full-length condition, where one donor was only tested once for technical reasons. A p-value less than 0.05 was considered significant. Abbreviations: PHA, phytohemagglutinin; LTR, long terminal repeat; IRES, internal ribosome entry site. ns: no significance (p > 0.05).

    Journal: bioRxiv

    Article Title: HIV-1 infection does not confer intrinsic resistance to cell death induced by cytotoxic T lymphocytes

    doi: 10.64898/2026.03.23.713717

    Figure Lengend Snippet: Effect of active viral expression on cell death resistance. (A) Experimental setup: Healthy donor CD4 + T cells were activated for 72 hours with PHA and infected with different HIV-1 GFP-reporter constructs. Cells were then pulsed with exogenous p53 R175H peptide and co-cultured with pre-expanded autologous CD8 + T cells and p53-specific scDb or irrelevant control scDb. Viability and GFP-expression were analyzed through flow cytometry. (B) Genome maps of the HIV-1 reporter constructs used to infect target cells. Each row represents one reading frame. Striped segments indicate gene segments that are no longer translated due to insertion of a STOP-codon. (C) Representative flow plot showing viable uninfected (GFP-negative) and HIV-1-expressing (GFP-positive) cell populations. (D) Viability of uninfected target cells or cells infected with indicated HIV-1 reporter constructs after co-culture with the HLA-A2:p53 R175H -restricted scDb. Each dot shows the average of three technical replicates per condition. Symbols represent individual donors; assay was performed 2 independent times for each of the n=5 healthy donors, except for the full-length condition, where one donor was only tested once for technical reasons. A p-value less than 0.05 was considered significant. Abbreviations: PHA, phytohemagglutinin; LTR, long terminal repeat; IRES, internal ribosome entry site. ns: no significance (p > 0.05).

    Article Snippet: To quantify the frequency of intact provirus before and after co-cultures, viable CD4 + T cells were isolated using the Milteniy Dead Cell Removal kit (Cat. No# 130-090-101) and the StemCell EasySep Human CD4 + T cell Enrichment kit (Cat. No# 19052), and genomic DNA was isolated with the Qiagen QIAamp DNA Micro kit (Cat. No# 56304) and used in the IPDA as previously described ( ).

    Techniques: Expressing, Infection, Construct, Cell Culture, Control, Flow Cytometry, Co-Culture Assay

    Modified assay targeting stably expressed HLA-E. (A) Cell surface levels of classical HLA-A2 and non-classical HLA-E molecules on untreated, uninfected and HIV-1-expressing cells. Healthy donor CD4 + T cells were either left untreated (NT) or activated with PHA over 72 hours and infected with indicated reporter virus construct. Cells were then sorted by GFP-expression and stained with PE-labeled monoclonal antibodies for HLA-A2 or HLA-E. Each bar represents average measurements across n=3 healthy donors. (B) Viability of uninfected target cells or cells infected with indicated HIV-1 reporter constructs after co-culture with the HLA-E-restricted RLP-13 scDb. Each dot shows the average of three technical replicates per condition. Symbols represent individual donors; assay was performed 2 independent times for each of the n=5 healthy donors. Bars indicate average viability and standard deviation.

    Journal: bioRxiv

    Article Title: HIV-1 infection does not confer intrinsic resistance to cell death induced by cytotoxic T lymphocytes

    doi: 10.64898/2026.03.23.713717

    Figure Lengend Snippet: Modified assay targeting stably expressed HLA-E. (A) Cell surface levels of classical HLA-A2 and non-classical HLA-E molecules on untreated, uninfected and HIV-1-expressing cells. Healthy donor CD4 + T cells were either left untreated (NT) or activated with PHA over 72 hours and infected with indicated reporter virus construct. Cells were then sorted by GFP-expression and stained with PE-labeled monoclonal antibodies for HLA-A2 or HLA-E. Each bar represents average measurements across n=3 healthy donors. (B) Viability of uninfected target cells or cells infected with indicated HIV-1 reporter constructs after co-culture with the HLA-E-restricted RLP-13 scDb. Each dot shows the average of three technical replicates per condition. Symbols represent individual donors; assay was performed 2 independent times for each of the n=5 healthy donors. Bars indicate average viability and standard deviation.

    Article Snippet: To quantify the frequency of intact provirus before and after co-cultures, viable CD4 + T cells were isolated using the Milteniy Dead Cell Removal kit (Cat. No# 130-090-101) and the StemCell EasySep Human CD4 + T cell Enrichment kit (Cat. No# 19052), and genomic DNA was isolated with the Qiagen QIAamp DNA Micro kit (Cat. No# 56304) and used in the IPDA as previously described ( ).

    Techniques: Modification, Stable Transfection, Expressing, Infection, Virus, Construct, Staining, Labeling, Bioprocessing, Co-Culture Assay, Standard Deviation