Anti-HBP15/L22 antibodies enable researchers to detect and measure the HBP15/L22 antigen in biological samples. This target is a reported synonym of the RPL22 gene, which encodes ribosomal protein L22. This protein is known to function in T cell differentiation and protein translation, among other biological roles. The human version of HBP15/L22 has a canonical amino acid length of 128 residues and a protein mass of 14.8 kilodaltons. It is reported to be localized in the cytoplasm of cells. Other names for this target antigen include EAP, EAP, and HBP15.