These Chk1 ELISA kits are immunodetection tools for measuring the levels of Chk1 in biological samples. Chk1 is an alias of the human CHEK1 gene, which encodes the protein, checkpoint kinase 1. Notably, Chk1 is known to play a role in the apoptotic pathway and chromatin remodeling, among other functions. The CHEK1 protein is 476 amino acid residues in length and 54.4 kilodaltons in mass. However, as many as 3 protein isoforms have been identified. It is localized to the nucleus and cytoplasm of the cell. In terms of tissue specificity, it is found to be widely expressed with the most abundant expression in thymus, testis, small intestine and colon. This protein is known to be ubiquitinated, cleaved and phosphorylated. Other names for this target antigen include . Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.