Anti-RPMS9 antibodies enable researchers to detect and measure the RPMS9 antigen in biological samples. This target is a reported synonym of the MRPS9 gene, which encodes mitochondrial ribosomal protein S9. This protein is known to function in mitochondrial translation, among other biological roles. The human version of RPMS9 has a canonical amino acid length of 396 residues and a protein mass of 45.8 kilodaltons. It is reported to be localized in the mitochondria of cells and widely expressed in many tissue types. RPMS9 is a member of the Universal ribosomal protein uS9 protein family.