Provided below are ELISA kits targeting macrophage stimulating 1 like, a human protein encoded by MST1L. This protein is 715 amino acids long, with a mass of 79.7 kDa, and is a member of the Peptidase S1 family, Plasminogen subfamily. 2 isoforms have been identified. This is reported to be a secreted protein. Other alias names for this protein include: putative macrophage stimulating 1-like protein, brain-rescue-factor-1, macrophage stimulating 1 (hepatocyte growth factor-like) pseudogene 9, macrophage stimulating pseudogene 7, putative macrophage-stimulating protein MSTP9, BRF-1, and D1F15S1A. ELISA kits are available that are reactive to human variants of the target antigen.