Sequence alignment between 1vrf(A) and UniProt seq P15447 (GLB4_GLYDI):

P15447 (GLB4_GLYDI): Globin, monomeric component M-IV from Glycera dibranchiata
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MGLSAAQRQVVASTWKDIAGSDNGAGVGKECFTKFLSAHHDIAAVFGFSGASDPGVADLGAKVLAQIGVAVSHLGDEGKMVAEMKAVGVRHKGYGYKHIKAEYFEPLGASLLSAMEHRIGGKMTAAAKDAWAAAYADISGALISGLQS
         .........................................X.....................................................X...........................X........................
PDB seq: -GLSAAQRQVVASTWKDIAGSDNGAGVGKECFTKFLSAHHDMAAVFGFSGASDPGVADLGAKVLAQIGVAVSHLGDEGKMVAEMKAVGVRHKGYGNKHIKAEYFEPLGASLLSAMEHRIGGKMNAAAKDAWAAAYADISGALISGLQS
          ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
                  10        20        30        40        50        60        70        80        90       100       110       120       130       140