Phylogenetic tree for high sulphur keratin-associated proteins (HS-KAPs) that have been identified in sheep, along with human HS-KAPs. The tree is assembled using amino acid sequences. The sheep KAPs are specified with an “s” prefix, while the human KAPs are specified with an “h”. The numbers at the forks show the bootstrap confidence values, with only those equal to or greater than 50% being shown. The newly identified sheep KAP28-1 gene is marked with a horizontal arrow. The GenBank accession numbers for all other sheep KAPs are: NM_001159760 (sKAP1-1), HQ897975 (sKAP1-2), NM_001159761 (sKAP1-3), GQ507741 (sKAP1-4), P02443 (sKAP2-1), U60024 (sKAP2-3), M21099 (sKAP3-1), M21100 (sKAP3-2), M21103 (sKAP3-3), HQ595352 (sKAP11-1), JN377429 (sKAP13-3), KX817979 (sKAP15-1) and JX112014 (sKAP24-1). The accession numbers for the human KAPs are: NM_181623 (hKAP15-1), NM_001146182 (hKAP16-1), NM_181624 (hKAP23-1), NM_001085455 (hKAP24-1), NM_001128598 (hKAP25-1), NM_203405 (hKAP26-1) and NM_001077711 (hKAP27-1).