despite its extremely slow rate of dissociation , pseudoirreversible binding was not covalent inasmuch as lowering the ph to 5 or adding the gtp analog 5'-guanylylimidodiphosphate [ gpp ( nh ) p ] completely dissociated prebound [ 3h ] nalbzoh .
C0018353
gtp
C0018366
gpp ( nh ) p