Multiple amino acid sequence alignments between H2A.Z subtypes isolated from carp and H2A.Z variants from human. Protein alignment was performed using ClustalW software (Conway Institute, University College Dublin (UCD), Dublin, Ireland). Amino acid differences are highlighted with blue background. The additional residues of variant H2A.Z.7 isolated from carp are depicted in yellow. Protein sequences from human H2A.Z subtypes were extracted from Bonisch et al..