Phosphoglucomutase electrophoretic patterns of the loach Cobitis biwae.

Phosphoglucomutase of two groups of the loach Cobitis biwae, a fresh-water teleost, was examined by starch gel electrophoresis. Some of the fishes had six-banded electrophoretic patterns not observed in other loach species (e.g. Misgurnus anguillicaudatus and Cobitis delicata). The complexity of the pattern is explainable by an assumption that the loaches are tetraploid fishes. The result suggests that a diploid-tetraploid relationship exists within the species Cobitis biwae.