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IdeS Protease

Promega Corp.

IdeS Protease is an immunoglobulin-degrading enzyme from Streptococcus pyogenes (IdeS). It is an engineered recombinant protease overexpressed in E. coli that cleaves Immunoglobulin G (IgG) with high specificity at a single site below the hinge region, yielding F(ab’)2 and Fc fragments. The protocol for a standard reaction is to add the IdeS Protease to the IgG sample, add 1 unit of IdeS Protease per 1µg of IgG to be digested…

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IdeZ Protease

Promega Corp.

IdeZ Protease is an immunoglobulin-degrading enzyme from Streptococcus equi subspecies zooepidemicus. It is an engineered recombinant protease overexpressed in E. coli. Like IdeS Protease, IdeZ Protease specifically cleaves IgG molecules below the hinge region to yield F(ab′)2 and Fc fragments. However, IdeZ Protease has significantly improved activity against mouse IgG2a and IgG3 subclasses compared to IdeS Protease.

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