[Isoenzyme makeup of the malate dehydrogenase in 2 species of Acetabularia].

The isozymes of malate dehydrogenase (MDH) were studied by means of electrophoresis in polyacrilamide gel in Acetabularia crenulata and A. mediterranea. The isozyme profile of MDH was shown to be variable in different parts of the plant. Distinct differences in isozyme profiles of MDH between A. crenulata and A. mediteranea were found when studying the cell fractions which consisted mainly of chloroplasts. The chloroplast fraction of A. mediterranea contained 8 isozymes which form 2 groups with different electrophoretic mobility. The chloroplast fraction of A. crenulata contained 9 isozymes. All the isozymes of the first group were common for both the species under study.