>sp|Q58071|KCY_METJA Cytidylate kinase OS=Methanocaldococcus jannaschii GN=cmk MIITIGGLPGTGTTTIAKMIAEKYNLRHVCAGFIFREMAKEMGMDLQEFSKYAEQHKEID EEIDRRQVEIAKQGNVVLEGRLAAWMLLKNGIKPDLTIWFKAPLEVRAERISKRENIDKD VALKKMIEREASEKKRYKEIYNIDLDDLSIYDLVIDTSKWDVEGVFNIVSSAIDNLKK