>tr|A0A8I1X2G5|A0A8I1X2G5_PROMR Cytochrome b6 OS=Prochlorococcus marinus str. XMU1401 GN=petB MANSSSVYDWFQERLEIQDITDDVTSKYVPPHVNIFYCLGGITLVCFLIQFATGFAMTFY YKPTVTQAYSSVSYLMTDVSFGWLIRSVHRWSASMMVLMLILHVFRVYLTGGFKRPRELT WVTGVVMAVITVAFGVTGYSLPWDQVGYWAVKIVSGVPAAIPVIGDFMVELLRGGESVGQ STLTRFYSLHTFVLPWSLAVFMLMHFLMIRKQGISGPL