HHsearch alignment for GI: 255764460 and conserved domain: cd02040

>cd02040 NifH NifH gene encodes component II (iron protein) of nitrogenase. Nitrogenase is responsible for the biological nitrogen fixation, i.e. reduction of molecular nitrogen to ammonia. NifH consists of two oxygen-sensitive metallosulfur proteins: the mollybdenum-iron (alternatively, vanadium-iron or iron-iron) protein (commonly referred to as component 1), and the iron protein (commonly referred to as component 2). The iron protein is a homodimer, with an Fe4S4 cluster bound between the subunits and two ATP-binding domains. It supplies energy by ATP hydrolysis, and transfers electrons from reduced ferredoxin or flavodoxin to component 1 for the reduction of molecular nitrogen to ammonia.
Probab=96.73  E-value=0.023  Score=34.55  Aligned_cols=37  Identities=27%  Similarity=0.399  Sum_probs=35.2

Q ss_pred             CEEEEEECCCCHHHHHHHHHHHHHHHCCCEEEEEECC
Q ss_conf             0799970687237899999987520089879999738
Q gi|255764460|r   68 RIVEIYGPESSGKTTLALHTIAQSQKTGGTCAFVDAE  104 (363)
Q Consensus        68 ri~ei~G~~~sGKTtlal~~~a~~qk~g~~~~~iD~E  104 (363)
T Consensus         2 r~Iai~GKGGVGKTTtavNLA~aLa~~GkkVlliDaD   38 (270)
T cd02040           2 RQIAIYGKGGIGKSTTTQNLSAALAEMGKKVMIVGCD   38 (270)
T ss_pred             CEEEEECCCCCCHHHHHHHHHHHHHHCCCEEEEECCC
T ss_conf             5899979985778999999999999879949998657