abnormal thalamus morphology decreased hypoxanthine-guanine phosphoribosyltransferase level decreased thalamus hypoxanthine-guanine phosphoribosyltransferase level 2013-11-10T20:12:53Z MP:0012211 MPheno.ontology csmith decreased thalamus 6-hydroxypurine phosphoribosyltransferase level decreased thalamus 6-mercaptopurine phosphoribosyltransferase level decreased thalamus GMP pyrophosphorylase level decreased thalamus GPRT level decreased thalamus HGPRT level decreased thalamus HGPRTase level decreased thalamus HPRT level decreased thalamus IMP pyrophosphorylase level decreased thalamus IMP-GMP pyrophosphorylase level decreased thalamus guanine phosphoribosyltransferase level decreased thalamus guanine-hypoxanthine phosphoribosyltransferase level decreased thalamus guanosine 5'-phosphate pyrophosphorylase level decreased thalamus guanosine phosphoribosyltransferase level decreased thalamus guanylate pyrophosphorylase level decreased thalamus guanylic pyrophosphorylase level decreased thalamus inosinate pyrophosphorylase level decreased thalamus inosine 5'-phosphate pyrophosphorylase level decreased thalamus inosinic acid pyrophosphorylase level decreased thalamus inosinic pyrophosphorylase level decreased thalamus purine-6-thiol phosphoribosyltransferase level decreased thalamus transphosphoribosidase level reduced level in the thalamus 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