Sequence alignment between 2r1h(B) and UniProt seq P02141 (HBB4_ONCMY):

P02141 (HBB4_ONCMY): Hemoglobin subunit beta-4 from Oncorhynchus mykiss
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MVDWTDPERSAIVGLWGKISVDEIGPQALARLLIVSPWTQRHFSTFGNLSTPAAIMGNPAVAKHGKTVMHGLDRAVQNLDDIKNTYTALSVMHSEKLHVDPDNFRLLADCITVCVAAKLGPAVFSADTQEAFQKFLAVVVSALGRQYH
         ......X...............................................................................XX.........X..................................................
PDB seq: -VDWTDAERSAIVGLWGKISVDEIGPQALARLLIVSPWTQRHFSTFGNLSTPAAIMGNPAVAKHGKTVMHGLDRAVQNLDDIKNTYVTLSVMHSEKLFVDPDNFRLLADCITVCVAAKLGPAVFSADTQEAFQKFLAVVVSALGRQYH
          ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
                  10        20        30        40        50        60        70        80        90       100       110       120       130       140