Anti-NSA1 antibodies enable researchers to detect and measure the NSA1 antigen in biological samples. This target is a reported synonym of the WDR74 gene, which encodes WD repeat domain 74. This protein is known to function in rRNA processing, among other biological roles. The human version of NSA1 has a canonical amino acid length of 385 residues and a protein mass of 42.4 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus of cells.