Ready-to-use ELISA kits are available for the detection of defensin, alpha, 3, an alias of the protein, defensin alpha 3. The official gene symbol is DEFA3. The protein, with a mass of 10.2 kDa and length of 94 residues, is reported to be secreted. It is a member of the Alpha-defensin family and may be known by other names, including: HNP3, HNP-3, neutrophil peptide 3, defensin alpha 3 neutrophil-specific, defensin 3 neutrophil-specific, and neutrophil defensin 3, and HP3.