2.4.2.8 hypoxanthine phosphoribosyltransferase BE(2)-M17 cell a neuroblastoma cell line 703955 3.4.11.6 aminopeptidase B BE(2)-M17 cell neuroblastoma cell line 665109, 666799 3.4.22.59 caspase-6 BE(2)-M17 cell - 717804