Description
studies utilized an effective in vitro assay for retinyl palmitate hydrolase (RPH) activity plasma renin activity determined The NADH-cytochrome b5 reductase activity decreased strikingly as the buffer or salt concentration in the assay mixture was increased, and the optimal pH for the reduction of cytochrome b5 with NADH was determined to be 6.6 in Tris-maleate buffer of constant ionic strength. A series of tris-maleate-buffered salt solutions, from pH 6.4 to 8.9 was used to assess the effect of pH on the two hour leakage of creatine kinase (CK) from isolated mouse heart