Extended polymorphism of the human esterase D isozyme system: description of a "new" allele EsD*11.

Using "new" techniques (malic acid thin layer agarose gel electrophoresis and/or isoelectric focusing), the polymorphism of the human red cell isozyme system esterase D (ESD) was shown to be extended. We report the gene frequencies observed among 312 unrelated Caucasian individuals living in the Düsseldorf area. The finding of a "new" allele at the ESD locus is also described.