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Cystine

Cystine

(Science: amino acid) The amino acid formed by linking two cysteine residues with a disulphide linkage between the two sh groups. The analagous compound present within proteins is termed two half cysteines.


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Re: Peptide binding to MHC molecule

... for serine would be probably OK volume-wise (-H is smaller the -CH2OH) but doesn’t have the possibility for making a hydrogen bond; substituting cystine for serine also is OK sterically (-CH2SH is about the same size as -CH2OH and the sulfur is slightly polar) but sulfur doesn’t make as good ...

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by blcr11
Sun Aug 24, 2008 6:42 pm
 
Forum: Molecular Biology
Topic: Peptide binding to MHC molecule
Replies: 1
Views: 719

Re: Competitive/Non competitive inhibitors

... simply inactivate the enzyme. I know amylase has a number of disulfide bridges, which probably won’t react with Cd, but if there is a crucial free cystine residue, well, you may get inhibition, but exactly what the kinetics will be, I wouldn’t care to predict. Maybe you would get what is called ...

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by blcr11
Mon Mar 17, 2008 2:34 pm
 
Forum: Molecular Biology
Topic: Competitive/Non competitive inhibitors
Replies: 3
Views: 878


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