xanthine phosphoribosyltransferase;
Xan phosphoribosyltransferase;
xanthosine 5'-phosphate pyrophosphorylase;
xanthylate pyrophosphorylase;
xanthylic pyrophosphorylase;
XMP pyrophosphorylase;
5-phospho-alpha-D-ribose-1-diphosphate:xanthine phospho-D-ribosyltransferase;
9-(5-phospho-beta-D-ribosyl)xanthine:diphosphate 5-phospho-alpha-D-ribosyltransferase