Comparative responses of ADPRibase-Mn enzymes to Mn²⁺ and Mg²⁺ as activators.

<p>Rates of substrate hydrolysis were measured in standard reaction mixtures except that Mn²⁺ concentration was varied as indicated, or that Mg²⁺ substituted for Mn²⁺. Error bars correspond to mean±S.D. (<i>n</i> = 3).