An enzyme catalyzes a reaction at a rate of 20 micromolar/min.mg when the concentration of substrate (S) is at 0.01 M. The Km of the enzyme for this substrate is 1 x 10-5 M. Assuming that Michaelis-Menten kinetics are followed, what will the reaction rate be when the concentration of S is 1 x 10-6 M?

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