ITC Thermograms of NADH Titrated into the pdNAD-MDH Wild-Type and Inactive Proteins.
(A) ITC profile of NADH injected into a solution of recombinant His-pdNAD-MDH wild-type protein at 25°C. The upper panel shows the raw calorimetric data. The plot below shows the integrated enthalpy as a function of the NADH/pdNAD-MDH molar ratio. Reactions are exothermic.
(B) to (D) Experiments were conducted as described for (A) with the His-pdNAD-MDH R162Q protein (B), the His-pdNAD-MDH R234Q protein (C), and the His-pdNAD-MDH R162Q R234Q protein (D).