Sequence alignment between 4pv1(H) and UniProt seq P83798 (PETN_MASLA):

P83798 (PETN_MASLA): Cytochrome b6-f complex subunit 8 from Mastigocladus laminosus 
                 10        20         
         ---------+---------+---------
UniProt: MEIDVLGWVALLVVFTWSIAMVVWGRNGL
PDB seq: -EIDVLGWVALLVVFTWSIAMVVWGRNGL
          --------+---------+---------
                 10        20