Provided below are ELISA kits targeting cyclin dependent kinase 9, a human protein encoded by CDK9. This protein is 372 amino acids long, with a mass of 42.8 kDa, and is a member of the Protein kinase superfamily, CMGC Ser/Thr protein kinase family, CDC2/CDKX subfamily. 2 isoforms have been identified. This is reported to be a cytoplasmic and nuclear protein. It is also an enzyme classified as a(n) cyclin-dependent kinase. There is a noted implication in cardiac myocyte enlargement leading to cardiac hypertrophy, and confers predisposition to heart failure. Other alias names for this protein include: CDC2-related kinase, cell division cycle 2-like protein kinase 4, cell division protein kinase 9, serine/threonine protein kinase PITALRE, C-2k, CDC2L4, and CTK1.