Ferredoxins are iron-sulfur proteins that transfer electrons in a wide variety of metabolic reactions. Donates electrons to the nitrogenase 2. Ferredoxin, vegetative fdxH2 99 MTTYQVRLINKKRAIDITIPVDENTTILDAAEQQDIELPFSCQSGSCSSCVAKVVEGEVDQSEQVFLDEEQMAKGFIVLCVSYPRSDCTIRTHQEPYLV Ava_4258 FERV_ANAVT