>sp|A4XKW9|ATPE_CALS8 ATP synthase epsilon chain OS=Caldicellulosiruptor saccharolyticus GN=atpC MAEFELEVLQPERIFFKDKVEMIVVRAIDGEIGIMAGHEPIVTPIGIGKLRIKKGGKWRE AAIAGGILEVNQNKVVILSDAVEWPEEIDRQRALAAKERAEKKLQQKLPPDEFERYQAAL YRAINRLRMIEERRNGD