Cysteine residues horse liver

The inactivation of yeast alcohol dehydrogenase by carbonyl-["C] [3- (3-bromoacetylpyridinio) -n-propyl ] adenosine pyrophosphate and methylene- [ "C ] [3- (4-bromoacetylpyridinio) -n-propyl] adenosine pyrophosphate was found to be solely the result of ketoalkylation of cysteine residue 43. With horse liver alcohol dehydrogenase, cysteine-174 reacted nearly exclusively with the inactivator [3-(4-bromoacetylpyridinio)-n-propyl]adenosine pyrophosphate. Carbonyl-[ C] [4-(3-bromoacetylpyridinio )-n-butyl] adenosine pyrophosphate modifies cysteine residue... 

Metallothioneins are curious proteins, whose function is still unknown. They have been found in kidneys, liver and gut of horses, rabbits and humans.-They- have-molecular weights of ca. 10,000, tlrey "corrtaih ca. 9% by weight of metal, and nearly 1/3 of their amino acid residues are cysteines... 

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