Electrophoretic types of leucine aminopeptidase in sheep serum

Abstract
Leucine aminopeptidase in sheep serum was studied by starch gel electrophoresis. Two phenotypes, A and B, were observed, of which the former was present in 70-90% of all the sheep examined. These 2 phenotypes were shown to be controlled by a single autosomal locus, with 2 alleles LapA and LapB. The LapA allele is dominant. The frequencies of Lap phenotypes and alleles were determined in 11 Spanish and 2 foreign breeds. Serum alkaline phosphatase and serum leucine aminopeptidase are electrophoretically distinct.