Multiple alignment of amino acid sequence of the Hw-Hip with other vertebrate and invertebrate H2A sequences obtained using BioEdit; Himanturin (Himantura pastinacoides), Buforin (Bufo bufo gargarizans), Teleostin (Tachysurus jella and Cynoglossus semifasciatus), Parasin (Parasilurus asotus), Hipposin (Hippoglossus hippoglossus), Harriotins (Neoharriotta pinnata), Human H2A, Fi Histin (Fenneropenaeus indicus), Sunettin (Sunetta scripta), Abhisin (Haliotis discus), Molluskin (Crassostrea madrasensis), Litopenaeus vannamei H2A, Artemia franciscana H2A, Penaeus monodon H2A and Mytilus galloprovincialis H2A