title: Biochemical variation in the Rana esculenta complex: a new hybrid form related to Rana perezi and Rana ridibunda.
abstract: Investigations of the green frogs from western Europe for electrophoretic variations at 4 enzyme loci demonstrated a new form which must be considered as a hybrid between Rana ridibunda and R. perezi. Biochemical evidence supports the hypothesis that its reproduction is hybridogenetic, as it is for R. esculenta.
mesh_terms: D000818:Animals; D001001:Anura; D001219:Aspartate Aminotransferases / Q000032:analysis; D003402:Creatine Kinase / Q000032:analysis; D004592:Electrophoresis, Starch Gel; D014644:Genetic Variation; D006824:Hybridization, Genetic; D007527:Isoenzymes / Q000032:analysis; D007770:L-Lactate Dehydrogenase / Q000032:analysis; D008967:Molecular Biology; D011893:Rana esculenta / Q000235:genetics*; D011898:Ranidae / Q000145:classification
chemical_list: D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase; D001219:Aspartate Aminotransferases; D003402:Creatine Kinase