>sp|A3PB49|CYB6_PROM0 Cytochrome b6 OS=Prochlorococcus marinus GN=petB MANSSSVYDWFQERLEIQDITDDVTSKYVPPHVNIFYCLGGITLVCFLIQFATGFAMTFY YKPTVTQAYSSVSYLMTDVSFGWLIRSVHRWSASMMVLMLILHVFRVYLTGGFKRPRELT WVTGVVMAVITVAFGVTGYSLPWDQVGYWAVKIVSGVPAAIPVIGDFMVELLRGGESVGQ STLTRFYSLHTFVLPWSLAVFMLMHFLMIRKQGISGPL