A number of ELISA Kits are available that target protease, serine, 45, an alias of the protein, Protease, serine 45. The human protein, encoded by the gene PRSS45, is an enzyme and a member of the Peptidase S1 family. It is also present in other species, such as: Mouse, Rat. Other name designations may also include: TESSP5; testis serine protease 5. protease, serine, 45 has a reported size of 29.3 kilodaltons with an amino acid length of 260. There are 2 recognized isoforms.