HIDDEN ALLELES AT THE -GLYCEROPHOSPHATE DEHYDROGENASE LOCUS IN COLIAS BUTTERFLIES

George B. Johnson ¹

¹ Department of Biology, Washington University, St. Louis, Missouri 63130

By varying polyacrylamide gel pore size, the -glycerophosphate dehydrogenase locus of Colias butterflies is shown to contain at least five alleles, rather than the two which had been reported previously. Two of the alleles have the same apparent net charge, and presumably are detected electrophoretically because of conformational differences. Additional variation occurs in the isoelectric points of the proteins. It is suggested that electrophoresis employing a single gel of intermediate pore size will fail to discriminate between many alleles, and that the concept of electrophoretic alleles as differing simply in charge may not always be appropriate.

"How does one know what it is one believes

When it's so difficult to know what it is one knows?"

—Jumpers (Stoppard, 1972)

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