Description:RecombinantProteinGisanimmunoglobulin-bindingproteinderivedfromthecellwallofcertainstrainsofb-hemolyticStreptococci.ItbindswithhighaffinitytotheFcportionofvariousclassesandsubclassesofimmunoglobulinsfromavarietyofspecies.ThealbuminandcellsurfacebindingdomainshavebeeneliminatedfromRecombinantProteinGtoreducenonspecificbindingand,therefore,canbeusedtoseparateIgGfromcrudesamples.DuetoitsaffinityfortheFcregionofmanymammalianimmunoglobulins,proteinGisamajorapplicationinpurifyingantibodies.ProteinGisconsideredauniversalreagentinbiochemistryandimmunology.
Applications:
Source:PurifiedfromE.colithatcarriestheproteinGgeneofGStreptococci.
Purity:>98%bySDS-PAGEandHPLCanalyses.ThealbuminbindingdomainaswellascellwallandcellmembranebindingdomainshavebeenremovedtoensurethemaximumspecificIgGbindingcapacity.ThisproteincontainsonlyIgGbindingdomains.
RecommendedStorageConditions:-20ºC.Avoidfreeze/thawcycles.
Usage:Underoptimalconditions,1mgproteinGwillbindapproximately5mghumanIgG.OptimalbindingofProteinGtoantibodiesoccursatpH5.0to6.0andcanbeelutedoverapHrangeof2.5to3.0.
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