PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 994751-2 1976 Through the use of a highly efficient C18 reverse phase column packing, it has also been possible to distinguish among geometrical and positional isomers of the unsaturated acids. unsaturated acids 162-179 Bardet-Biedl syndrome 9 Homo sapiens 39-42