complete the following mechanism showing the cleavge of the peptide bond for the following cysteine protease reaction. you only need a catalytic dyad for cystein proteases because the pKa of cysteine is low enough (8) and close enough to the pH of 7.4 that is can easily be deprotonated by histidine.

Biochemistry
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Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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Chapter1: Biochemistry: An Evolving Science
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complete the following mechanism showing the cleavge of the peptide bond for the following cysteine protease reaction. you only need a catalytic dyad for cystein proteases because the pKa of cysteine is low enough (8) and close enough to the pH of 7.4 that is can easily be deprotonated by histidine. 

HN
R
rpeptide
bond
NH-R
H₂C.
Cys
Substrate
SH
N.
His
CH₂
NH
Catalytic Dyad
Transcribed Image Text:HN R rpeptide bond NH-R H₂C. Cys Substrate SH N. His CH₂ NH Catalytic Dyad
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