PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25272525-5 2014 The severity of physical defects correlates with the severity of the cholesterol deficiency, which is caused by an abnormally low activity of 7-dehydrocholesterol reductase, the enzyme responsible for conversion of 7-dehydrocholesterol to cholesterol. Cholesterol 69-80 7-dehydrocholesterol reductase Homo sapiens 142-172