the purified preparation of choline kinase had a sigmoid saturation curve with respect to choline , with a hill number of 2.3 , and was inhibited by adp ( competitive in nature and allosteric in binding , with a hill number of 2.7 ) and by phosphorylcholine ( non-competitive and non-allosteric ) .
C0008405
choline
C0031716
phosphorylcholine