>sp|A2BN21|RTCA_HYPBU RNA 3'-terminal phosphate cyclase OS=Hyperthermus butylicus GN=rtcA MIVIDGSIGEGGGQILRTTLALAALLGKPVRIVNIRAKRPRPGLQRQHLTSVKAVAELAS ARVEGLELGSTTLVFIPRGLRSGRFYFNIGTAGSITLVLQALLPVTAFAPGPVEVEIVGG TDVPWSPPIDYVRFVLRKLLAMFGFEFEIIVKRRGHYPRGGGRVVLRVTQPPHVLKPVKL EERGKVLRVEGLSHAVRLPRHVAERQARSAEAVLRSKLPGVPISIDLEWYEPSRDPHLGP GSGVVVWAVAEHSVLGSDSLGAKGKPAEAVGREAAEKLLEDLATGTALDRHASDMLIPYA ALACGESILGGARLTMHAWTNIEVVKMLVPGAEMEFIEGGKLNEKFKLRVKGICYKPSS