title: A fourth allele in the plasma esterase-1 (Es-1) system of the domestic fowl.
abstract: Plasma samples of fowl were analysed by horizontal polyacrylamide gel electrophoresis (pH 9.0). Evidence was presented for the subdivision of an earlier reported esterase-1 allele (Es-1A) into two alleles designated Es-1A1 and Es-1A2. Family data were consistent with the hypothesis that the Es-1 phenotypes were controlled by four codominant, autosomal alleles Es-1C, Es-1A1, Es-1A2 and Es-1B). The White Leghorn samples showed high frequency of Es-1A1 (about 0.7) and also had considerable frequency of Es-1A2 (0.2) and of Es-1B (0.1). The three meat-type breeds studied (White Plymouth Rock, Rhode Island Red and New Hampshire) showed a very high frequency of Es-1B (0.8-1.0).
mesh_terms: D000483:Alleles; D000818:Animals; D002265:Carboxylic Ester Hydrolases / Q000097:blood / Q000235:genetics*; D002645:Chickens; D004591:Electrophoresis, Polyacrylamide Gel; D005787:Gene Frequency; D005796:Genes; D005799:Genes, Dominant; D010641:Phenotype; D011200:Poultry; D013045:Species Specificity
chemical_list: D002265:Carboxylic Ester Hydrolases