The HIF-1A ELISA kits listed below are analytical tools for measuring concentrations of HIF-1A in various samples. HIF-1A is an alternative name for the human HIF1A gene, which encodes the protein, hypoxia inducible factor 1 subunit alpha. It has been mentioned that HIF-1A plays a role in angiogenesis and the cellular response to hypoxia, among other functions. Structurally, the HIF1A protein is 826 amino acid residues in length and 92.7 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 reported to be expressed in most tissues with highest levels in kidney and heart. This protein is known to be glycosylated, ubiquitinated, sumoylated, acetylated and phosphorylated. Other names for this target antigen include HIF-1-alpha, HIF-1-alpha, and HIF-1alpha.