tokens: A molecular study using standard methods showed G6PD in the patient to have normal electrophoretic mobility ( at pH 7 . 0 , 8 . 0 and 8 . 8 ) , normal apparent affinity for substrates ( Km , G6P and NADP ) and a slightly abnormal utilization of substrate analogues ( decreased deamino - NADP and increased 2 - deoxyglucose - 6 - phosphate utilization ) .