Defensins are cysteine-rich cationic polypeptides that are important in the immunologic response to invading microorganisms. The protein encoded by this gene is secreted and is a member of the beta defensin protein family. Beta defensin genes are found in several clusters throughout the genome, with this gene mapping to a cluster at 20p13.[6]
Rodríguez-Jiménez FJ, Krause A, Schulz S, et al. (2003). "Distribution of new human beta-defensin genes clustered on chromosome 20 in functionally different segments of epididymis". Genomics. 81 (2): 175–83. doi:10.1016/S0888-7543(02)00034-4. PMID12620395.