3 ) the binding affinity for mgatp was weakened considerably in the mutants ( lys much much greater than gln greater than glu ) , whereas the binding affinity for mgadp was affected only mildly ( lys = gln greater than glu ) , suggesting that lysine 155 interacts with the gamma-phosphate of atp bound at a single high affinity catalytic site .
C0017797
gln
C0061472
glu