>sp|P54806|GLNB4_METBA Nitrogen fixation nifHD2 region GlnB-like protein 2 OS=Methanosarcina barkeri MKEITAIIRMNKAQRTKDVLLECGFPSFTIRRVMGRGKQRGLCHEFNPPLPDPEKEAETC IRFIPKRMFTIVVDDENVSEVVQKIIEVNQTGNAGDGKIFVSDVTEAIRIRTGESGEATV NKELV