Homologs of gpt from Desulfovibrio vulgaris Hildenborough JW710
gpt: xanthine-guanine phosphoribosyltransferase (TIGR)
SEED: Xanthine-guanine phosphoribosyltransferase (EC 2.4.2.22)
KEGG: xanthine phosphoribosyltransferase
87 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser