Recombinant proteins for H2A histone family member J are available from various sources. In humans, this protein has a Uniprot ID of Q9BTM1 and has an annotated function: 'Core component of nucleosome.' This protein is 129 amino acids in length and 14.1 kilodaltons in mass. It has been designated a subcellular localization as: nuclear. This protein is encoded by the gene H2AFJ. Other names also exist, such as: histone H2A.J, H2a/j, buforin I. As many as 2 isoforms have been named. This protein is conserved in other species, including: mouse, rat.