. "\"Catalysis of the reaction: uridine + phosphate = uracil + alpha-D-ribose 1-phosphate.\" [EC:2.4.2.3]" . . "uridine phosphorylase activity" . "UPase activity" . "UrdPase activity" . "uridine:phosphate alpha-D-ribosyltransferase activity" . "EC:2.4.2.3" . "MetaCyc:URPHOS-RXN" . "Reactome:REACT_101041 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Danio rerio\"" . "Reactome:REACT_101427 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Sus scrofa\"" . "Reactome:REACT_103383 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Rattus norvegicus\"" . "Reactome:REACT_109044 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Xenopus tropicalis\"" . "Reactome:REACT_109074 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Taeniopygia guttata\"" . "Reactome:REACT_109460 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Mus musculus\"" . "Reactome:REACT_110273 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Caenorhabditis elegans\"" . "Reactome:REACT_110888 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Xenopus tropicalis\"" . "Reactome:REACT_1812 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Homo sapiens\"" . "Reactome:REACT_2200 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Homo sapiens\"" . "Reactome:REACT_30745 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Canis familiaris\"" . "Reactome:REACT_32075 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Drosophila melanogaster\"" . "Reactome:REACT_33167 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Canis familiaris\"" . "Reactome:REACT_77223 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Bos taurus\"" . "Reactome:REACT_84353 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Sus scrofa\"" . "Reactome:REACT_88039 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Bos taurus\"" . "Reactome:REACT_90697 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Mus musculus\"" . "Reactome:REACT_91776 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Drosophila melanogaster\"" . "Reactome:REACT_91985 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Taeniopygia guttata\"" . "Reactome:REACT_94957 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Gallus gallus\"" . "Reactome:REACT_99312 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Danio rerio\"" . "Reactome:REACT_99510 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Rattus norvegicus\"" . "Reactome:REACT_99604 \"(deoxy)uridine + orthophosphate <=> uracil + (deoxy)ribose 1-phosphate [UPP], Caenorhabditis elegans\"" . "Reactome:REACT_99702 \"uracil + (deoxy)ribose 1-phosphate <=> (deoxy)uridine + orthophosphate [UPP], Gallus gallus\"" . "RHEA:24391" . . "UPH" . "pyrimidine phosphorylase activity" .