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Postby J~N » Mon May 23, 2005 3:58 pm

Can anyone help me to define Exopeptidase please? i hv look up the dictionary in this web but still i can't find it .... This term appeared in my text book and said it is used to breakdown the TERMINAL peptide bond of a polypeptide , breakdown of terminal bond means amino acids can be fomed. So how is it differ from the dipeptidase then ? both of them hv the same function...?????.i am confused ><
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Postby Chris4 » Mon May 23, 2005 4:22 pm

Please refer to rule #4. relevant title :)
Exopeptidase - Any of a group of enzymes that catalyze the hydrolysis of single amino acids from the end of a polypeptide chain. (from an online dictionary)
An endopeptidase catalyses the hydrolysis of single amino acids in the middle of a polypeptide chain.
Doesnt a dipeptidase just catalyze the hydrolysis of dipeptides into the two amino acids.
So no, i dont think they have the same function.
TERMNAL just means the bond on the end. N-terminal and C-terminal.
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Postby MrMistery » Mon May 23, 2005 6:40 pm

Chris4 is right. A dipeptidase breaks the bond between 2 aminos in a dipeptide, resulting 2 free amino acids
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