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Neb 10 beta competent e coli high efficiency

Manufactured by New England Biolabs
Sourced in United States

NEB® 10-beta Competent E. coli (High Efficiency) is a high-efficiency competent E. coli cell strain for routine molecular biology applications. This product is suitable for transformation of plasmid DNA into E. coli cells.

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3 protocols using neb 10 beta competent e coli high efficiency

1

Cloning and Amplification of Luciferase Plasmid

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mRNA-encoding firefly luciferase (mRNA-Luc) was purchased from TriLink Biotechnologies (San Diego, CA, USA) with the substitution of N1-Methylpseudouridine for uridine.
To generate the pDNA-encoding firefly luciferase gene (pVAX1-Luc), the Luc gene from the pcDNA3-Luc plasmid (Addgene, Watertown, MA, USA) was cloned into the pVAX1 plasmid vector (ThermoFisher, Ottawa, ON, Canada) using HindIII-HF and XbaI restriction enzymes (New England Biolabs, Whitby, ON, Canada). pVAX1-Luc was transformed into NEB® 10-beta Competent E. coli (High Efficiency) (New England Biolabs, Ipswich, MA, USA)according to the manufacturer’s protocol). Large-scale amplifications of pVAX1-Luc were generated using the EndoFree QIAGEN Plasmid Giga Kit (Montreal, QC, Canada) according to the manufacturer’s instructions.
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2

Construction of NoMi Expression Plasmid

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The vector (Addgene #73037) encoding for copGFP, puromycin and nanoluc was restricted with BamHI and XbaI and used as backbone for a Gibson assembly (New England Biolabs) to insert a gBlock (IDT) encoding for the N-terminus of NoMi (see Figure S1b). The resulting plasmid was restricted with BmgBI and BarI to incorporate the NoMi C-terminus with Gibson assembly and generate the NoMi plasmid.
Each assembly reaction contained approximately 100 ng insert and 50 ng expression vector and was incubated at 50 °C for 30 min - 4 h following the manufacturer’s protocol. The plasmids were transformed into NEB® 10-beta Competent E. coli (High Efficiency) (New England Biolabs) and overnight grown at 37 °C on antibiotic containing agar plates [10 mL Bacto agar (Sigma) with LB medium in a 60 mm dish]. Single colonies were picked, grown in LB broth (Sigma) and extracted using a QIAprep Spin Miniprep Kit (Qiagen). To confirm correct insertion, a restriction digest was performed, and fragments electrophoresed in a 1.5% agarose gel and stained with GelRed (Biotium). Images were acquired under UV light using Azure Biosystems c300 Image. When correct profiles were detected, complete plasmid sequencing using Next-Generation sequencing technology (MGH CCIB DNA Core) was performed to validate plasmid integrity.
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3

Construction of NoMi Expression Plasmid

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The vector (Addgene #73037) encoding for copGFP, puromycin and nanoluc was restricted with BamHI and XbaI and used as backbone for a Gibson assembly (New England Biolabs) to insert a gBlock (IDT) encoding for the N-terminus of NoMi (see Figure S1b). The resulting plasmid was restricted with BmgBI and BarI to incorporate the NoMi C-terminus with Gibson assembly and generate the NoMi plasmid.
Each assembly reaction contained approximately 100 ng insert and 50 ng expression vector and was incubated at 50 °C for 30 min - 4 h following the manufacturer’s protocol. The plasmids were transformed into NEB® 10-beta Competent E. coli (High Efficiency) (New England Biolabs) and overnight grown at 37 °C on antibiotic containing agar plates [10 mL Bacto agar (Sigma) with LB medium in a 60 mm dish]. Single colonies were picked, grown in LB broth (Sigma) and extracted using a QIAprep Spin Miniprep Kit (Qiagen). To confirm correct insertion, a restriction digest was performed, and fragments electrophoresed in a 1.5% agarose gel and stained with GelRed (Biotium). Images were acquired under UV light using Azure Biosystems c300 Image. When correct profiles were detected, complete plasmid sequencing using Next-Generation sequencing technology (MGH CCIB DNA Core) was performed to validate plasmid integrity.
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