Abstract
Abstract Extracts of nine isolates of oscillatorian algae were compared for their pigment, protein, and lactic, glutamic, and malic dehydrogenase isozyme patterns using acrylamide gel electrophoresis. Differences in the pigment and protein patterns were neither distinctive nor numerous. Lactic dehydrogenase was not detected in any extract and glutamic dehydrogenase in only two extracts. Malic dehydrogenase was present in seven of the extracts. Some similarities of patterns were observed among the five narrow-filament isolates (all varieties of Schizothrix calcicola) and two of the wide-filament isolates (Porphyrosiphon, Oscillatoria). Isozyme analyses may be a useful taxonomic tool in the blue-green algae.
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