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Beta-Defensin-3 (HBD-3/MBD-3)

Catalogue number: DEF03-S

Units100 µl
Application ELISA
IHC not established
The peptide sequences of HBD-3/MBD-3 used for immunisation contain very little consensus aa with any of the other human or mouse defensins. Human defensins are Cys-rich antimicrobial peptides which specifically react against Gram-negative bacteria. Originally defensins were isolated from hemolysates, but they can also be found on the cell surface of epithelia of the urogenital tract, lung, and trachea. In leukocytes defensins are stored in granules being released into phagolysosomes for the destruction of incorporated micro-organisms. Amino acid sequences of alpha-defensins 1-4 (HNP1-4) and beta-Defensins 1-4 (HBD1-4) are known. Mature Human Beta-Defensin-3 (HBD-3) shares app. 22% aa sequence homology with HBD-1. ß-defensin-3 of human and mouse origin, N-terminal fragments of HBD-3 and MBD-3, no cross-reactivity with other known ß-defensins or alpha-defensins.

Positive Control
Skin and airway epithelia

Mixture of synthetic peptides 15 aa near C-terminus of the mature HBD-3 (LPKEEQIGKCSTRGR) and 13 aa of N-terminal MBD-3, coupled to KLH for immunisation of rabbits

Purification Method
Rabbit serum lyophilized with PBS and sodium azide 0.05%

Working Concentration
(lyophilisate) 1:1000 - 1:5000 WB, 1:10000 - 1:50000 ELISA

Rabbit serum lyophilized with PBS and sodium azide 0.05%

ELISA, RIA, IHC not established

Cross Reactivity
Human, mouse


1. Harder J., Bartels J., Christophers E., and J.-M. Schröder (1997) Antibacterial peptide specific for Gram-negative Bacteria / also effective for Candida albicans. Nature 387; 861ff 2. Bals R., Wang X., Meegalla R. L., Wattler S., et al. (1999) Mouse ß-Defensin 3 is an inducible antimicrobial peptide expressed in the epithelia of multiple organs. Infection and Immunity 67(7); 3542-3547. 3. Jia H.P., Schutte B.C., Schudy A., Linzmeier R., et al. (2001) Discovery of new human beta-defensins using a genomics-based approach. Gene 263(1-2);211-218. 4. Garcia J.R., Jaumann F., Schulz S., Krause A., et al. (2001) Identification of a novel multifunctional beta-defensin (human beta-defensin 3) with specific antimicrobial activity. Its interaction with plasma membranes of Xenopus oocytes and the induction of macrophage chemoattraction. Cell Tissue Res. 306(2); 257-264. 5. Harder J., Bartels J., Christophers E., and J.-M. Schröder (2001) Isolation and characterization of human beta-defensin-3, a novel human inducible peptide antibiotic. J. Biol. Chem. 276(8); 5707-5713.

These antibodies are intended for in vitro research use only. They must not be used for clinical diagnostics and not for in vivo experiments in humans or animals.

Safety Datasheet(s) for this product:

Beta-Defensin-3 (HBD-3/MBD-3)


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Exalpha Biologicals, Inc.
2 Shaker Road, Unit B101
Shirley, MA 01464
Phone: 978-425-1370