>sp|P40312|CYB5_YEAST Cytochrome b5 OS=Saccharomyces cerevisiae GN=CYB5 MPKVYSYQEVAEHNGPENFWIIIDDKVYDVSQFKDEHPGGDEIIMDLGGQDATESFVDIG HSDEALRLLKGLYIGDVDKTSERVSVEKVSTSENQSKGSGTLVVILAILMLGVAYYLLNE