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2 protocols using amicon ultra 0.5 ml centrifugal units

1

Optimized His-tagged Protein Purification

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All chemicals were used as supplied by vendors without further purification. Imidazole, Invitrogen Novex WedgeWell 14% Tris-Glycine Mini Protein Gels, Isopropy-ß-D-thiogalactopyranoside (IPTG), lysozyme, NativePAGE 4 to 16% Bis-Tris Mini Protein Gels, NativeMark Unstained Protein Standard, Spectra Multicolor Broad Range Protein Ladder, Thermo Scientific Pierce 660 nm Protein Assay Reagent, Tris base, Tris HCl, all restriction enzymes, and all cell culture media and reagents were purchased from Fisher Scientific, Inc. (USA). Gibson Assembly Master Mix was purchased from NEB (USA). Amicon Ultra 0.5 mL centrifugal units and Benzonase nuclease were purchased from MilliporeSigma (USA). BL21 (DE3) Electrocompetent Cells used for Escherichia coli expression were also purchased from MilliporeSigma (USA). Bis-tris propane from Research Products International (USA) was used for the assembly buffer. Ni-NTA agarose from Gold Biotechnology, Inc. (USA) was used for His-tagged protein purification.
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2

Protein Expression and Purification

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All chemicals were used as supplied by vendors without further purification. Imidazole, Invitrogen Novex WedgeWell 14% tris-glycine Mini Protein Gels, NativePAGE 4 to 16% bis-tris Mini Protein Gels, NativeMark Unstained Protein Standard, Isopropy-b-d-thiogalactopyranoside (IPTG), lysozyme, Spectra Multicolor Broad Range Protein Ladder, Pierce BCA protein assay kit, Tris base, Tris HCl, all restriction enzymes, and all cell culture media and reagents were purchased from Fisher Scientific, Inc. (USA). Gibson Assembly Master Mix and Q5 High-Fidelity DNA Polymerase were purchased from NEB (USA). Amicon Ultra-0.5 mL centrifugal units, Benzonase nuclease, and BL21 (DE3) Electrocompetent Cells used for E. coli expression were purchased from MilliporeSigma (USA). Ni-NTA agarose from Gold Biotechnology, Inc. (USA) was used for His-tagged protein purification.
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