Recombinant proteins for S1 RNA binding domain 1 are available from various sources. In humans, this protein has a Uniprot ID of Q8N5C6. This protein is 995 amino acids in length and 111.8 kilodaltons in mass. This protein is encoded by the gene SRBD1. Other names also exist, such as: S1 RNA-binding domain-containing protein 1, H_NH0576F01.1, WUGSC:H_NH0576F01.1. As many as 2 isoforms have been named. This protein is conserved in other species, including: mouse, rat.