A variant of glucose-6-phosphate dehydrogenase (G6PD), characterized by slower than normal electrophoretic migration and associated with mild deficiency of G6PD in the red cells, was detected in two unrelated Greek males. Electrophoretic, chromatographic, and enzymologic study indicated that the new mutant is structurally different from normal G6PD (B+) and from the Mediterranean variant associated with red-cell enzyme deficiency (B-). Convincing electrophoretic separation of the new variant from the normal B+ and the Mediterranean B- enzymes was achieved only by detailed electrophoretic study in different buffer systems and conditions.

DOI: 10.2307/1721396
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