in a parallel nmr study of the paramagnetic effects of enzyme-bound co2+ ( which occupies the mn2+ site on the enzyme ) on the t1 of 31p from enzyme-bound 3',5'-pdtp and 5'-tmp , it was found that metal to 5'-phosphate distances are 0.9-1.6 a shorter in ternary complexes of the wild-type enzyme and of the d21e mutant than in ternary complexes of the d40g mutant .
C0014442
enzyme
C0026741
complexes