Anti-MAP3K19 antibodies are used in the immunodetection of the protein mitogen-activated protein kinase kinase kinase 19. In humans, the canonical protein has a reported length of 1328 amino acid residues and a mass of 150.5 kDa. Up to 5 different isoforms have been reported for this protein. A member of the STE Ser/Thr protein kinase protein family, MAP3K19 is known to be involved with protein phosphorylation. Synonyms for this target antigen include YSK4 Sps1/Ste20-related kinase homolog, regulated in COPD kinase, regulated in COPD, protein kinase, yeast Sps1/Ste20-related kinase 4, and SPS1/STE20-related protein kinase YSK4. MAP3K19 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. ELISA is a widely used application for the MAP3K19 antibodies listed below. In addition, Western Blot is also a common application.