PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3112309-6 1987 The phenotypic variation and the fact that increased levels of glycosaminoglycans were not found in the urine of the two patients lead to the suggestion that in certain cases a correct diagnosis may be missed if the beta-glucuronidase activity in plasma and leucocytes is not determined and only routine urine investigation is performed as a screening for a mucopolysaccharidosis. Glycosaminoglycans 63-81 glucuronidase beta Homo sapiens 216-234