abnormal thalamus morphology increased hypoxanthine-guanine phosphoribosyltransferase level increased thalamus hypoxanthine-guanine phosphoribosyltransferase level 2013-11-10T20:12:53Z MP:0012212 MPheno.ontology csmith greater level in the thalmus 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 increased thalamus 6-hydroxypurine phosphoribosyltransferase level increased thalamus 6-mercaptopurine phosphoribosyltransferase level increased thalamus GMP pyrophosphorylase level increased thalamus GPRT level increased thalamus HGPRT level increased thalamus HGPRTase level increased thalamus HPRT level increased thalamus IMP pyrophosphorylase level increased thalamus IMP-GMP pyrophosphorylase level increased thalamus guanine phosphoribosyltransferase level increased thalamus guanine-hypoxanthine phosphoribosyltransferase level increased thalamus guanosine 5'-phosphate pyrophosphorylase level increased thalamus guanosine phosphoribosyltransferase level increased thalamus guanylate pyrophosphorylase level increased thalamus guanylic pyrophosphorylase level increased thalamus inosinate pyrophosphorylase level increased thalamus inosine 5'-phosphate pyrophosphorylase level increased thalamus inosinic acid pyrophosphorylase level increased thalamus inosinic pyrophosphorylase level increased thalamus purine-6-thiol phosphoribosyltransferase level increased thalamus transphosphoribosidase level