There are a number of ELISA Kits available for the measurement of STE20-like kinase, another term for the human protein, STE20 like kinase. Other synonyms may include: CTCL tumor antigen se20-9, Long Ste20-like Kinase, SNF1 (sucrose nonfermenting yeast homolog)-like kinase SNF1 sucrose nonfermenting like kinase, STE20-related kinase, and STE20-related serine/threonine-protein kinase. It is encoded by the SLK gene to yield a protein 1235 amino acids in length and 142.7 kDa in size. However, there are up to 2 reported isoforms. The protein, an enzyme, is categorized into the Protein kinase superfamily, STE Ser/Thr protein kinase family, STE20 subfamily. Versions of STE20-like kinase are present in other organisms, including: Mouse, Rat, Fly, Chicken.