title: Adult lactase deficiency: genetic control or adaptive response?
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D003677:Deficiency Diseases / Q000150:complications; D005006:Ethnicity; D006026:Glycoside Hydrolases / Q000378:metabolism*; D006801:Humans; D007421:Intestine, Small / Q000201:enzymology*; D007527:Isoenzymes; D007785:Lactose; D007787:Lactose Intolerance / Q000209:etiology / Q000235:genetics*; D051381:Rats
chemical_list: D007527:Isoenzymes; D006026:Glycoside Hydrolases; D007785:Lactose