title: Expression of lactate dehydrogenase isozyme X in haploid cells of pigeon testis.
abstract: Electrophoretic patterns of lactate dehydrogenase (EC 1.1.1.27) from adult testes show the existence of three different phenotypes for the isozyme X or C4 in populations of racing homer pigeons. These phenotypes are the expression of two different alleles at the Ldh c locus. Analysis of electrophoretic patterns of lactate dehydrogenase from lysates of mature spermatozoa isolated from pigeons heterozygous at the Ldh c locus indicates that the two different alleles are expressed in haploid cells. It is concluded that transcription of the gene coding for isozyme X must occur only in pre-meiotic cells.
mesh_terms: D000818:Animals; D010856:Columbidae / Q000235:genetics*; D004592:Electrophoresis, Starch Gel; D006238:Haploidy; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000235:genetics*; D008297:Male; D010641:Phenotype; D013091:Spermatogenesis; D013094:Spermatozoa / Q000201:enzymology*; D013737:Testis / Q000201:enzymology*
chemical_list: D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase