uridine 5'-phosphate ( ump ) synthase is a multifunctional protein that contains the last two enzyme activities for the de novo biosynthesis of ump , orotate phosphoribosyltransferase ( ec 2.4.2.10 ) and orotidine-5'-phosphate ( omp ) decarboxylase ( ec 4.1.1.23 ) .
C0041921
uridine
C0042002
ump