title: The basic aspects of the chemical background of lactase deficiency.
mesh_terms: D000328:Adult; D000367:Age Factors; D000818:Animals; D002648:Child; D005696:Galactosidases / Q000378:metabolism; D005809:Genes, Regulator; D006801:Humans; D007413:Intestinal Mucosa / Q000201:enzymology*; D007785:Lactose; D007787:Lactose Intolerance / Q000175:diagnosis / Q000378:metabolism*; D008892:Milk
chemical_list: D005696:Galactosidases; D007785:Lactose