ymeexplorer.PepsinisapeptidaseusedtodigestproteinsandiscommonlyusedinthepreparationofFabfragmentsfromantibodies.Pepsin,fromporcinegastricmucosa,hasbeenusedtohydrolyzedrycervicalsamplesinmice.ProductP7000isprovidedasapowderandhasbeenusedtotreatepithelialcellsfromasinglefelinemammarycarcinoma.
TheenzymefromSigmahasbeenusedtosimulateinvitrogastricdigestionofcookedcod.Ithasbeenusedtosimulateinvitrogastricdigestionofcocoamassandsupplementeddietaryfiber.Ithasalsobeenusedtoincreasethefractionofextractablesolublecollagenandtolowertheimmunogenicityoftheresultingcollagenfrombovinedermaltissue.
Biochem/physiolActions
Preferentialcleavage:hydrophobicandaromaticresiduesinP1andP1′postitions.CleavesPhe-Val,Gln-His,Glu-Ala,Ala-Leu,Leu-Tyr,Tyr-Leu,Gly-Phe,Phe-PheandPhe-Tyrbondsintheβchainofinsulin
Pepsinhydrolyzespeptidebonds,notamideoresterlinkages.Pepsincleavespeptideswithanaromaticacidoneithersideofthepeptidebond.Sulfur-containingaminoacidsincreasesusceptibilitytohydrolysiswhentheyareclosetothepeptidebond.Pepsinpreferentiallycleavesatthecarboxylsideofphenylalanineandleucineandatthecarboxylsideofglutamicacidresidues.CleavesPhe-Val,Gln-His,Glu-Ala,Ala-Leu,Leu-Tyr,Tyr-Leu,Gly-Phe,Phe-PheandPhe-Tyrbondsintheβchainofinsulin
Pepsinisthemajorproteolyticenzymeproducedinthestomach.Itdigestsproteinsthroughthecleavageofinteriorpeptidelinkages..
Theenzymedoesnotcleaveatvaline,alanine,orglycinelinkages.Z-L-tyrosyl-L-phenylalanine,Z-L-glutamyl-L-tyrosine,andZ-L-methionyl-L-tyrosinemaybeusedassubstratesforpepsindigestion.Pepsinisinhibitedbyseveralphenylalanine-containingpeptides.OtherNotes
Viewmoreinformationonpepsinatwww.sigma-aldrich.com/enzymeexplorer.Packaging
1kginpolybottle
25,100ginpolybottle
UnitDefinition
OneunitwillproduceaΔA280of0.001perminatpH2.0at37?°C,measuredasTCA-solubleproductsusinghemoglobinassubstrate.(Finalvolume=16ml.Lightpath=1cm.)
Safety:
Symbol
GHS07,GHS08
Hazardstatements
H315-H319-H334-H335
Precautionarystatements
P261-P305+P351+P338-P342+P311
PersonalProtectiveEquipment
dustmasktypeN95(US),Eyeshields,Faceshields,Gloves
RIDADR
NONHforallmodesoftransport