01 2.3 x 26.OC "pH" as read with a glass electrode. The pHs were unchanged at the end of the reaction. Standard deviation within each run less than 1%; duplicate runs usually within 1%, with a few within 10%. than pyruvic acid. With a-oxovaleric acid as substrate, which is ca. 20% slower ... As Table I shows, all the pyridoxamines with basic side chains (10-16) show significant accelerations relative to pyridoxamine itself (7) or 9. However, the optimum catalysis ...