Anti-Ctk1 antibodies enable researchers to detect and measure the Ctk1 antigen in biological samples. This target is a reported synonym of the CDK9 gene, which encodes cyclin dependent kinase 9. This protein is known to function in cell proliferation and cytokine-mediated signaling pathways, among other biological roles. The human version of Ctk1 has a canonical amino acid length of 372 residues and a protein mass of 42.8 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. Other names for this target antigen include C-2k, C-2k, and CDC2L4. Western Blot is the most common application for the Ctk1 antibodies listed below. ELISA and Immunohistochemistry are also common applications.