ymeexplorer.PepsinfromSigmahasbeenusedalongwithotherenzymesforthedeterminationofenzyme-resistantstarch(RS)inbread.Ithasalsobeenusedtosimulateinvitrogastrointestinaldigestionofpeaorwheyproteinisolates.
PepsinisapeptidaseusedtodigestproteinsandiscommonlyusedinthepreparationofFabfragmentsfromantibodies.Pepsin,fromporcinegastricmucosa,hasbeenusedtohydrolyzedrycervicalsamplesinmice.ProductP6887isprovidedasalyophilizedpowderandhasbeenusedtodigestproteinduringdietaryfiberanalysis.
Biochem/physiolActions
Preferentialcleavage:hydrophobicandaromaticresiduesinP1andP1′postitions.CleavesPhe-Val,Gln-His,Glu-Ala,Ala-Leu,Leu-Tyr,Tyr-Leu,Gly-Phe,Phe-PheandPhe-Tyrbondsintheβchainofinsulin
Unlikemanyotherpeptidases,pepsinhydrolyzesonlypeptidebonds,notamideoresterlinkages.Thecleavagespecificityincludespeptideswithanaromaticacidoneithersideofthepeptidebond,especiallyiftheotherresidueisalsoanaromaticoradicarboxylicaminoacid.Increasedsusceptibilitytohydrolysisoccursifthereisasulfur-containingaminoacidclosetothepeptidebond,whichhasanaromaticaminoacid.Pepsinwillalsopreferentiallycleaveatthecarboxylsideofphenylalanineandleucine,andtoalesserextentatthecarboxylsideofglutamicacidresidues.Itdoesnotcleaveatvaline,alanine,orglycinelinkages.Z-L-tyrosyl-L-phenylalanine,Z-L-glutamyl-L-tyrosine,orZ-L-methionyl-L-tyrosinemaybeusedassubstratesforpepsindigestion.Pepsinisinhibitedbyseveralphenylalanine-containingpeptides.OtherNotes
Viewmoreinformationonpepsinatwww.sigma-aldrich.com/enzymeexplorer.Packaging
1,5,10ginpolybottle
250mginpolybottle
UnitDefinition
OneunitwillproduceaΔA280of0.001perminatpH 2.0at37°C,measuredasTCA-solubleproductsusinghemoglobinassubstrate.(Finalvolume=16 ml.Lightpath=1 cm.)
Safety:
Symbol
GHS07,GHS08
Hazardstatements
H315-H319-H334-H335
Precautionarystatements
P261-P305+P351+P338-P342+P311
PersonalProtectiveEquipment
dustmasktypeN95(US),Eyeshields,Faceshields,Gloves
RIDADR
NONHforallmodesoftransport