SRRM2 encodes the human gene, Serine/arginine repetitive matrix 2. It may also be known as: Serine/arginine repetitive matrix protein 2; Serine/arginine-rich splicing factor-related nuclear matrix protein of 300 kDa; SR-related nuclear matrix protein of 300 kDa; Ser/Arg-related nuclear matrix protein of 300 kDa; Splicing coactivator subunit SRm300; Tax-responsive enhancer element-binding protein 803; TaxREB803; 300 kDa nuclear matrix antigen; 300-KD; CWF21; Cwc21; SRL300; SRm300. The encoded protein has an amino acid length of 2752 and a mass of 299.6 kDa. Other isoforms may exist. SRRM2 is a member of the CWC21 family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.