Guest guest Posted March 9, 2004 Report Share Posted March 9, 2004 Hi all, Rich wrote, " ...I believe that the reason for this is that the cysteine in the whey protein must be kept in its original cysteine state, and not oxidized to cystine. " Maybe I could remember this if I knew how to pronounce the proteins (and are they proteins?). Is one of them " sis-teen " and the other " sis-tine " ? Which is which? Thanks, Sue B., Upstate New York Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 9, 2004 Report Share Posted March 9, 2004 Steine kson - the famous skier something Valentine - a famous actor > Hi all, > > Rich wrote, " ...I believe that the reason for this is that the cysteine in > the whey protein must be kept in its original cysteine state, and not > oxidized to cystine. " > > Maybe I could remember this if I knew how to pronounce the proteins (and are > they proteins?). Is one of them " sis-teen " and the other " sis-tine " ? > Which is which? > > Thanks, > Sue B., > Upstate New York Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 9, 2004 Report Share Posted March 9, 2004 I wasn't thinking at the time I don't think this is right > Steine kson - the famous skier > something Valentine - a famous actor > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 9, 2004 Report Share Posted March 9, 2004 Hi, Sue. They're amino acids. Cysteine is pronounced " sis'-teh-een. " Cystine is pronounced " sis'-tine. " A cystine molecule consists of two cysteine molecules joined together at their sulfur atoms, with a disulfide bond. They each drop a hydrogen ion and an electron (from their sulfhydryl group) to form this disulfide bond. Chemically this represents an oxidation reaction, which means a removal of electrons. When proteins that contain cysteine residues (a residue is what's left of an amino acid when it links together with other amino acids to form a protein molecule) are heated in air (as in the pasteurization of milk) or are treated with acids (as in cheesemaking), the cysteine residues in the protein tend to become oxidized and join together as cystine residues. Rich > Hi all, > > Rich wrote, " ...I believe that the reason for this is that the cysteine in > the whey protein must be kept in its original cysteine state, and not > oxidized to cystine. " > > Maybe I could remember this if I knew how to pronounce the proteins (and are > they proteins?). Is one of them " sis-teen " and the other " sis- tine " ? > Which is which? > > Thanks, > Sue B., > Upstate New York Quote Link to comment Share on other sites More sharing options...
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