F-ATPase epsilon subunit ATP synthase epsilon chain Produces ATP from ADP in the presence of a proton gradient across the membrane. 139 ATP synthase F1 sector epsilon subunit atpC MAQLTVQIVTPDGLVYDHHASYVSVRTLDGEMGILPRHENMIAVLAVDEVKVKRIDDKDHVNWIAVNGGVIEIANDMITIVADSAERARDIDISRAERAKLRAERAIEEAQDKHLIDQERRAKIALQRAINRINVGNRL ATPE_STRR6 spr1359