Cytochrome b subunit of the cytochrome bc1 complex, an essential component of the respiratory electron transport chain required for ATP synthesis. The bc1 complex catalyzes the oxidation of menaquinol and the reduction of cytochrome c in the respiratory chain. The bc1 complex operates through a Q-cycle mechanism that couples electron transfer to generation of the proton gradient that drives ATP synthesis.

Belongs to the cytochrome b family.

541 amino acids

MSNKLATVGNNLDSRYTMAGGIRRQINKVFPTHWSFLLGEIALYSFIILILTGVYLTLFFDPSITKVIYDGAYLPLNGVEMSRAYMTALDISFEVRGGLFVRQMHHWAALMFVVSMMVHMMRIFFTGAFRRPREANWVIGVVLLILGIAEGFMGYSLPDDLLSGVGLRIMSAIIVGLPIIGTWMHWMIFGGDFPSDIMLDRFYIAHVLIIPGIILGLIAAHLALVWYQKHTQFPGAGRTENNVIGIRIMPVFAVKSVAFGAITLGFLSLLAGVTTINAIWNLGPYNPSQVSAGSQPDIYMLWTDGAARVMPAWELYFGNYTVPAVFWVAIMLGILVVLLIAYPWIEKKLTGDDAHHNLLQRPRDVPVRTSLGVMALIFYILLTISGGNDIWAYQFDVSLNAMTWIGRIGLIVFPAIGYFVTYRLCIGLQRSDREVLEHGIETGVIKQMPNGAFIEVHQPLGPVDEHGHPIPLPYSGAKVPKQLNELGFAEVESRGGFFGPDPESVATKANEIAHANHLEEVATLAAIQEENRKRDQAEGRI

60 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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