Ready-to-use ELISA kits are available for the detection of LARP3, an alias of the protein, small RNA binding exonuclease protection factor La. The official gene symbol is SSB. The protein, with a mass of 46.8 kDa and length of 408 residues, is reported to be nuclear. It may be known by other names, including: la autoantigen, autoantigen La, SS-B/La protein, SS-B, La ribonucleoprotein domain family member 3, and lupus La protein, and sjoegren syndrome type B antigen.