PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25262616-8 2014 The almost four-fold higher dN /dS ratio described for the European roe deer lineage is constrained by overall purifying selection, especially pronounced in the ND4 and ND5 genes. dn 28-30 ND4 Capreolus pygargus 161-164