abnormal hypothalamus morphology decreased hypoxanthine-guanine phosphoribosyltransferase level decreased hypothalamus hypoxanthine-guanine phosphoribosyltransferase level 2013-11-10T20:12:53Z MP:0012213 MPheno.ontology csmith decreased hypothalamus 6-hydroxypurine phosphoribosyltransferase level decreased hypothalamus 6-mercaptopurine phosphoribosyltransferase level decreased hypothalamus GMP pyrophosphorylase level decreased hypothalamus GPRT level decreased hypothalamus HGPRT level decreased hypothalamus HGPRTase level decreased hypothalamus HPRT level decreased hypothalamus IMP pyrophosphorylase level decreased hypothalamus IMP-GMP pyrophosphorylase level decreased hypothalamus guanine phosphoribosyltransferase level decreased hypothalamus guanine-hypoxanthine phosphoribosyltransferase level decreased hypothalamus guanosine 5'-phosphate pyrophosphorylase level decreased hypothalamus guanosine phosphoribosyltransferase level decreased hypothalamus guanylate pyrophosphorylase level decreased hypothalamus guanylic pyrophosphorylase level decreased hypothalamus inosinate pyrophosphorylase level decreased hypothalamus inosine 5'-phosphate pyrophosphorylase level decreased hypothalamus inosinic acid pyrophosphorylase level decreased hypothalamus inosinic pyrophosphorylase level decreased hypothalamus purine-6-thiol phosphoribosyltransferase level decreased hypothalamus transphosphoribosidase level reduced hypothalamus HGPRT level reduced hypothalamus hypoxanthine-guanine phosphoribosyltransferase level reduced level in the hypothalamus of the enzyme that catalyzes conversion of hypoxanthine to inosine monophosphate and guanine to guanosine monophosphate via transfer of the 5-phosphoribosyl group from 5-phosphoribosyl 1-pyrophosphate