SRRM2 Protein, Human, Recombinant (His & Myc)Tax-responsive enhancer element-binding protein 803 (TaxREB803), SRRM2, SRM300, SRL300, Splicing coactivator subunit SRm300, 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), Serine/arginine repetitive matrix protein 2, KIAA0324, 300 kDa nuclear matrix antigen