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We are excited to introduce our new product     D-Lactate dehydrogenase from Microorganism Cat No. 183649   Specification   Product name                                      (R)-Lactate: NAD+ oxidoreductase EC                                                          1.1.1.28 Appearance                                          White amorphous powder lyophilized Activity                                                  Grade II, 1100U/mg-protein or more Contaminants                                       Malate dehydrogenase ≤ 1.0×10-2% Myokinase ≤ 0×10-2% Pyruvate kinase ≤ 1.0×10-3% NADH oxidase ≤ 1.0×10-3% GOT ≤ 5.0×10-3% GPT ≤ 5.0×10-3% Stability                                                  Stable at −20c for at least 12 months Molecular weight                                 approx. 140,000 Isoelectric point                                   4.0 Michaelis constant                              6.4×10-4 M (pyruvate, pH 7.0) Inhibitors                                             Ag2+, Hg2+, SH-reagents Optimum pH                                       5.0−7.0 Optimum temperature                     30−37 c pH Stability                                          pH 5.0−9.0 (25 c, 48hr) Thermal stability                                 below 45 c (pH 7.0, 15min)