Abstract
Polymorphism in plasma amylase, plasma alkaline phosphatase, non-specific esterase and red cell esterase-D of the Athens-Canadian randombred (ACRB) population of chickens was determined by polyacrylamide and starch gel electrophoresis. Amylase alleles Amy-1A and Amy-1B were segregating in the ACRB population with frequencies of 0.45 and 0.55 respectively. For the plasma alkaline phosphatase the F and S bands, the B band and a new isozyme migrating at a faster rate than the previously reported F band were detected. A genetic nomenclature for plasma alkaline phosphatase is suggested which considers the difference between the F and S bands as the presence or absence of sialic acid attached to a primary protein. Plasma esterase activity was observed in all four of the regions previously reported, but there was no polymorphism found in any of the loci. All birds in this population showed the same red-cell esterase-D phenotype which consisted of a main band with sub-bands on each side.
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