PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 23867846-6 2013 For example, the HO2/OH ratios from the CMAQ model simulations with GEIA isoprene emissions were 2.7 times larger than those from the CMAQ model simulations based on MEGAN isoprene emissions. megan isoprene 166-180 heme oxygenase 2 Homo sapiens 17-20