The Hypoxia Inducible Factor 1, alpha ELISA kits listed below utilize specific antibodies for the plate-based assay of Hypoxia Inducible Factor 1, alpha in various samples. Hypoxia Inducible Factor 1, alpha is another term for the HIF1A gene, which encodes the protein, hypoxia inducible factor 1 subunit alpha in humans. It has been reported that Hypoxia Inducible Factor 1, alpha 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.