PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 167012-4 1975 The ratio IE/IM is proportional to c/eta, where c is the microscopic concentration of the pyrene confined to the hydrocarbon region of the lipoprotein and eta is the microviscosity of that region. pyrene 90-96 endothelin receptor type A Homo sapiens 37-40