>3K2N_1|Chains A, B|Sigma-54-dependent transcriptional regulator|Chlorobium tepidum TLS (194439) SNAALKLMQYIGDAIGTIRDPQELFRTVTDKLRLLFAFDSAVIITIDRERREASVFFEMLRFELPEQLRHQTRSIAGTWLEGHLDDRTVTVASIARDIPSFGADGAPLLWTLHELGMRQIVLSPLRSGGRVIGFLSFVSAEEKLWSDGDKSLLSGVSSSIAIAVSNALAYEELRQRE