PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19960866-2 2009 All mammals, apart from white Northern Europeans and few tribes in Africa and Asia, lose most of their lactase, the enzyme that cleaves lactose into galactose and glucose, after weaning. Galactose 149-158 lactase Homo sapiens 103-110