Human Defensin beta 2 Protein


SDS-Page: Human Defensin beta 2 Protein [NBP2-34910]

Product Details

Reactivity HuSpecies Glossary
Applications Func, PAGE

Order Details

Human Defensin beta 2 Protein Summary

A biologically active protein to Defensin beta 2.

Source: E. coli

Novus' biologically active proteins are stringently purified to provide only the safest and most highly effective proteins available. This protein was expressed in E. coli, purified by HPLC, QC tested by SDS-PAGE and Western Blot and validated on appropriate cell lines for bioactivity. All HPLC and bioactivity data is provided for your assurance.
Details of Functionality
Defensin beta 2 protein is fully biologically active when compared to standard. The biological activity determined by a chemotaxis bioassay using immature human dendritic cells is in a concentration range of 10-100 ng/ml.
>95% pure by SDS-PAGE
Endotoxin Note
Less than 1 EU/ug of endotoxin as determined by LAL method.

Packaging, Storage & Formulations

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
>95% pure by SDS-PAGE
Reconstitution Instructions
Reconstitute with sterilized distilled water or 0.1% BSA aqueous buffer to a final concentration of 0.1 - 1.0 mg/ml.


  • Functional
  • SDS-Page
Theoretical MW
4.3 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.


This lyophilized preparation is stable at 2-8 degrees C, but should be kept at -20 degrees C for long term storage, preferably desiccated. Upon reconstitution, the preparation is most stable at -20 to -80 degrees C, and can be stored for one week at 2-8 degrees C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20 degrees C to -80 degrees C. Avoid repeated freeze/thaw cycles.

Alternate Names for Human Defensin beta 2 Protein

  • BD-2
  • Defb2 defensin beta 2
  • Defb2
  • defensin beta 2


Defensins (alpha and beta) are cationic peptides with antimicrobial activity against Gram-negative and Gram-positive bacteria, fungi, and enveloped viruses. They are 2-6 k Da proteins and take important roles in innate immune system. On the basis of their size and pattern of disulfide bonding, mammalian defensins are classified into alpha, beta and theta categories. B-Defensins contain a six-cysteine motif that forms three intra-molecular disulfide bonds. Four human B-defensins have been identified and they are expressed on some leukocytes and at epithelial surfaces. Because B-defensins is cationic peptides, they can therefore interact with the membrane of invading microbes, which are negative due to lipopolysaccharides (LPS) and lipoteichoic acid (LTA) found in the cell membrane. Especially, they have higher affinity to the binding site compared to Ca 2+ and Mg2+ ions. Furthermore, they can affect the stability of the membrane.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Peptides and proteins are guaranteed for 2 years from date of receipt.

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