FIG. 3.

XDH activity response to the purine source. XDH-specific activities from cell extracts of C. purinolyticum were cultured on different purines (12 mM) except where indicated. Activities given represent the mean from at least three independent cultures, and error bars indicate 1 SD from the mean. A*, adenine-grown cell extract (1 mM); A, adenine-grown cell extract; P, purine-grown cell extract; HX, hypoxanthine-grown cell extract; X, xanthine-grown cell extract; U, uric acid-grown cell extract.