PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27230-10 1978 A slight, but definite increase in oxygen affinity was observed for Hb A2 as well as for Hb P-Nilotic while the increase for the Hb Lepore-Washington was somewhat greater. Oxygen 35-41 hemoglobin subunit alpha 2 Homo sapiens 68-73