Anti-serine and arginine-rich splicing factor 7 antibodies are used for the immunodetection of the protein encoded by the SRSF7 gene. In humans, the canonical protein has a reported length of 238 amino acid residues and a mass of 27.4 kDa. Its subcellular localization is in the nucleus and cytoplasm. Alternative splicing is reported to yield 4 different isoforms for this protein. A member of the Splicing factor SR protein family, it is said to be required for pre-mRNA splicing. Post-translational modifications have been described, including phosphorylation. Other names for this target antigen include AAG3, SFRS7, serine/arginine-rich splicing factor 7, SR splicing factor 7, aging-associated protein 3, and 9G8. Gene orthologs have been identified in the mouse, rat, bovine, frog and chimpanzee species.