3.5.4.4 adenosine + H2O = inosine + NH3 - - 3.5.4.4 adenosine + H2O = inosine + NH3 reaction mechanism, structure-function relationship of ADA and dipeptidyl peptidase IV 667032 3.5.4.4 adenosine + H2O = inosine + NH3 structure-activity relationships 669783