PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 34492971-1 2021 Ammonia stress changes microbial metabolism of anaerobic digestion and decreases methane yield, where proton pump overactivated by free ammonia suggested to be the centre of the metabolism changes in anaerobic digestion under ammonia stress. Methane 81-88 ATPase H+/K+ transporting subunit alpha Homo sapiens 102-113