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Recombinant Protein G  pdf  pdf  pdf

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RPG-S3140-1g(20mg x 50)
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RPG, Protein G, ProteinG


Recombinant Protein G Protein, also known as Recombinant Staphylococcus Aureus protein G148, was expressed in E.Coli at ACRObiosystems.

Molecular Characterization

Recombinant Protein G Protein was fused with the polyhistidine tag at N-terminus and a single cysteine at C-terminus. DTT-reduced protein migrates as a 31 kDa polypeptide. Protein G Protein can bind to human IgG1 Fc .


Less than 1.0 EU per μg of the protein by LAL method.


>98% as determined by SDS-PAGE of reduced Recombinant Protein G Protein.


Lyophilized from 0.22 μm filtered solution in PBS, pH 7.4.

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See Certificate of Analysis for details of reconstitution instruction and specific concentration.


Avoid repeated freeze-thaw cycles.

No activity loss was observed after storage at:
In lyophilized state for 1 year (4oC-8oC); After reconstitution under sterile conditions for 1 month (4oC-8oC) or 3 months (-20oC to -70oC).



Protein G
The purity of Recombinant Protein G Protein was determined by SDS-PAGE of reduced Recombinant Protein G Protein and staining overnight with Coomassie Blue.


Protein G is an immunoglobulin-binding protein expressed in group C and G Streptococcal bacteria much like Protein A but with differing specificities. It is a 65-kDa (G148 protein G) and a 58 kDa (C40 protein G) [1] cell surface protein that has found application in purifying antibodies through its binding to the Fc region. The native molecule also binds albumin, however, because serum albumin is a major contaminant of antibody sources, the albumin binding site has been removed from this recombinant form of Protein G.


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