title: Natural selection for enzyme variants among parthenogenetic Daphnia magna.
mesh_terms: D000818:Animals; D003621:Daphnia / Q000201:enzymology*; D004589:Electrophoresis, Disc; D004950:Esterases / Q000032:analysis; D005828:Genetics, Population; D006579:Heterozygote; D007527:Isoenzymes / Q000032:analysis; D008291:Malate Dehydrogenase / Q000032:analysis; D011110:Polymorphism, Genetic
chemical_list: D007527:Isoenzymes; D008291:Malate Dehydrogenase; D004950:Esterases