There are a number of ELISA Kits available for the measurement of U1AP, another term for the human protein, small nuclear ribonucleoprotein U1 subunit 70. Other synonyms may include: U1 small nuclear ribonucleoprotein 70 kDa, U1 snRNP 70 kDa, small nuclear ribonucleoprotein 70kDa (U1), small nuclear ribonucleoprotein U1 70kDa subunit, RPU1, SNRP70, and Snp1. It is encoded by the SNRNP70 gene to yield a protein 437 amino acids in length and 51.6 kDa in size. However, there are up to 4 reported isoforms. Versions of U1AP are present in other organisms, including: Mouse, Rat, Zebrafish, Frog.