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e coli bl21 derivative strain  (New England Biolabs)


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    New England Biolabs e coli bl21 derivative strain
    E Coli Bl21 Derivative Strain, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 96/100, based on 283 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/e+coli+bl21+derivative+strain/T7+Express+lysY+Comp+E%2Ecoli/pmc13035853-261-5-11
    Average 96 stars, based on 283 article reviews
    e coli bl21 derivative strain - by Bioz Stars, 2026-09
    96/100 stars

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    Expressing:

    Article Title: Beta-arrestin 1 mediated Src activation via Src SH3 domain revealed by cryo-electron microscopy
    Article Snippet: Escherichia coli strain DH5α (C2987, New England Biolabs) was used for plasmid propagation. .. Protein expression was done in E. coli BL21 derivative strain (C3010, New England Biolabs). .. Human embryonic kidney CRISPR-Cas9-based βarr1/βarr2 double knock-out cell line (HEK-293 βarr1/βarr2 dKO) ( ) was maintained in Gibco Minimum Essential Media (MEM) supplemented with 1% penicillin-streptomycin and 10% (v/v) fetal bovine serum at 37 °C and 5% CO 2 .

    Article Title: Mechanism of beta-arrestin 1 mediated Src activation via Src SH3 domain revealed by cryo-electron microscopy.
    Article Snippet: Escherichia coli strain DH5α (C2987, New England Biolabs) was used for plasmid propagation. .. Protein expression was done in E. coli BL21 derivative strain (C3010, New England Biolabs). .. Human embryonic kidney CRISPR-Cas9-based βarr1/βarr2 double knock-out cell line (HEK-293 βarr1/βarr2 dKO)28 was maintained in Gibco Minimum Essential Media (MEM) supplemented with 1% penicillin-streptomycin and 10% (v/v) fetal bovine serum at 37 °C and 5% CO2.

    Article Title: Mechanism of beta-arrestin 1 mediated Src activation via Src SH3 domain revealed by cryo-electron microscopy
    Article Snippet: Escherichia coli strain DH5α (C2987, New England Biolabs) was used for plasmid propagation. .. Protein expression was done in E. coli BL21 derivative strain (C3010, New England Biolabs). .. Human embryonic kidney CRISPR-Cas9-based βarr1/βarr2 double knock-out cell line (HEK-293 βarr1/βarr2 dKO) was maintained in Gibco Minimum Essential Media (MEM) supplemented with 1% penicillin-streptomycin and 10% (v/v) fetal bovine serum at 37 °C and 5% CO 2 .



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    Pasteur Institute e. coli bl21(de3) derivate strain en2
    Preparation of recombinant proteins with different degrees of DnaK contamination. (A–C) Analysis of the levels of contamination with DnaK found in different purified carrier proteins commonly used in <t>E.</t> <t>coli</t> expression systems. Lane Pep(pET29b): peptide encoded in pET29b plasmid; Lane Trx(pET32b): thioredoxin protein and connector peptide from pET32b plasmid; Lane TrxFNR: thioredoxin protein fused to the mature pea ferredoxin‐NADP+ reductase encoded in the pET205 plasmid; Lanes GST(pGEX‐3X) and GST(pGEX‐2T): GST protein and connector peptide from pGEX‐3X and pGEX‐2T plasmids, respectively. The level of DnaK contamination in each purified carrier protein (C) was obtained by determining the intensity of the DnaK band in the immunoblot B as integrated optical density (IODDnaK) and expressed relative to the IOD of the corresponding Ponceau red stain band (IODpurified protein) in A. (D and E) Western blot with anti‐DnaK antiserum against purified GST protein obtained from JM109 E. coli cells (E. coli JM109 lane), or from BB1553 E. coli cells (E. coli ΔdnaK lane), previously transformed with the pGEX‐2T plasmid. Purified proteins were run in 12% SDS‐PAGE, transferred to nitrocellulose membrane, stained with Ponceau red solution (A and D), and analyzed by Western blot using a specific anti‐DnaK antiserum (B and E).
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    Preparation of recombinant proteins with different degrees of DnaK contamination. (A–C) Analysis of the levels of contamination with DnaK found in different purified carrier proteins commonly used in E. coli expression systems. Lane Pep(pET29b): peptide encoded in pET29b plasmid; Lane Trx(pET32b): thioredoxin protein and connector peptide from pET32b plasmid; Lane TrxFNR: thioredoxin protein fused to the mature pea ferredoxin‐NADP+ reductase encoded in the pET205 plasmid; Lanes GST(pGEX‐3X) and GST(pGEX‐2T): GST protein and connector peptide from pGEX‐3X and pGEX‐2T plasmids, respectively. The level of DnaK contamination in each purified carrier protein (C) was obtained by determining the intensity of the DnaK band in the immunoblot B as integrated optical density (IODDnaK) and expressed relative to the IOD of the corresponding Ponceau red stain band (IODpurified protein) in A. (D and E) Western blot with anti‐DnaK antiserum against purified GST protein obtained from JM109 E. coli cells (E. coli JM109 lane), or from BB1553 E. coli cells (E. coli ΔdnaK lane), previously transformed with the pGEX‐2T plasmid. Purified proteins were run in 12% SDS‐PAGE, transferred to nitrocellulose membrane, stained with Ponceau red solution (A and D), and analyzed by Western blot using a specific anti‐DnaK antiserum (B and E).

    Journal: Protein Science : A Publication of the Protein Society

    Article Title: A novel method for removing contaminant Hsp70 molecular chaperones from recombinant proteins

    doi: 10.1002/pro.3574

    Figure Lengend Snippet: Preparation of recombinant proteins with different degrees of DnaK contamination. (A–C) Analysis of the levels of contamination with DnaK found in different purified carrier proteins commonly used in E. coli expression systems. Lane Pep(pET29b): peptide encoded in pET29b plasmid; Lane Trx(pET32b): thioredoxin protein and connector peptide from pET32b plasmid; Lane TrxFNR: thioredoxin protein fused to the mature pea ferredoxin‐NADP+ reductase encoded in the pET205 plasmid; Lanes GST(pGEX‐3X) and GST(pGEX‐2T): GST protein and connector peptide from pGEX‐3X and pGEX‐2T plasmids, respectively. The level of DnaK contamination in each purified carrier protein (C) was obtained by determining the intensity of the DnaK band in the immunoblot B as integrated optical density (IODDnaK) and expressed relative to the IOD of the corresponding Ponceau red stain band (IODpurified protein) in A. (D and E) Western blot with anti‐DnaK antiserum against purified GST protein obtained from JM109 E. coli cells (E. coli JM109 lane), or from BB1553 E. coli cells (E. coli ΔdnaK lane), previously transformed with the pGEX‐2T plasmid. Purified proteins were run in 12% SDS‐PAGE, transferred to nitrocellulose membrane, stained with Ponceau red solution (A and D), and analyzed by Western blot using a specific anti‐DnaK antiserum (B and E).

    Article Snippet: Ratelade et al. 7 have constructed an E. coli BL21(DE3) derivate strain free from DnaK chaperone by inactivating the dnaK gene (EN2 strain; CNCM I‐3863; Pasteur Institute).

    Techniques: Recombinant, Purification, Expressing, Plasmid Preparation, Western Blot, Staining, Transformation Assay, SDS Page, Membrane