The HP4 ELISA kits listed below are analytical tools for measuring concentrations of HP4 in various samples. HP4 is an alternative name for the human DEFA4 gene, which encodes the protein, defensin alpha 4. It has been mentioned that HP4 plays a role in the cellular response to lipopolysaccharides, among other functions. Structurally, the DEFA4 protein is described to be 97 amino acid residues in length and 10.5 kilodaltons in mass. Its subcellular localization is in the cytoplasmic vesicles and is secreted. In terms of tissue specificity, it is reported to be expressed in neutrophils. Other names for this target antigen include DEF4, HNP-4, and HP-4. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.