Product Details

Purity

>98% as determined by SDS-PAGE.

Endotoxin

Less than 1.0 EU/μg as determined by LAL method.

Activity

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.

Target Names

DEFB4A

Uniprot No.

O15263

Research Area

Microbiology

Alternative Names

BD 2; BD-2; BD2; beta 2; beta 2 Defensin; Beta defensin 2; Beta defensin 4B; Beta-defensin 2; Beta-defensin 4A; DEF B2; DEF B4; DEFB 102; DEFB 2; DEFB 4; DEFB102; DEFB2; DEFB2; formerly; DEFB4; DEFB4; formerly; DEFB4B; DEFB4P; Defensin; Defensin beta 2; Defensin; beta 4; Defensin; beta 4; pseudogene; Defensin; beta 4A; Defensin; beta 4B; Defensin; beta; 2; formerly; Defensin; beta; 4; formerly; DFB4A_HUMAN; HBD 2; hBD-2; HBD2; mBD-2; SAP 1; SAP1; Skin antimicrobial peptide 1; Skin-antimicrobial peptide 1

Species

Homo sapiens (Human)

Source

E.coli

Expression Region

24-64aa

Complete Sequence

GIGDPVTCLK SGAICHPVFC PRRYKQIGTC GLPGTKCCKK P

Mol. Weight

4.3 kDa

Protein Length

Full Length of Mature Protein

Tag Info

Tag-Free

Form

Lyophilized powder

Buffer

Lyophilized from a 0.2 µm filtered 20 mM PB, pH 7.4, 130 mM NaCl

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Troubleshooting and FAQs

Protein FAQs

Storage Condition

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.

Shelf Life

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.

Lead Time

5-10 business days

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Datasheet & COA

Please contact us to get it.

Description

This Recombinant Human DEFB4A protein serves as an essential tool for investigators in the field of microbiology. The Defensin beta 4A, also known as DEFB4A, is expressed in E. coli, featuring the 24-64aa expression region of the full-length mature protein. The tag-free protein is provided as a lyophilized powder, allowing for straightforward reconstitution with sterile water or buffer to facilitate a wide range of experimental applications.

With a commitment to quality and performance, our Recombinant Human DEFB4A protein exhibits a purity of >98% as determined by SDS-PAGE and HPLC analysis. Furthermore, endotoxin levels are maintained below 1.0 EU/µg, as assessed by the LAL method. The protein demonstrates full biological activity in a chemotaxis bioassay using immature human dendritic cells, with an effective concentration range of 10-100 ng/ml.

Human DEFB4A has been the focus of numerous studies due to its role in host defense and antibacterial properties. Semple et al. (2010)^[1] and Harder et al. (2007)^[2] reported on the antimicrobial and immunomodulatory functions of DEFB4A. In addition, Hancock et al. (2016)^[3] discussed its potential as a therapeutic agent for the treatment of infectious diseases. These studies highlight the importance of DEFB4A in the innate immune system and its potential as a therapeutic target.

References:
1. Semple F, et al. Beta-defensins: multifunctional modulators of infection, inflammation and more? J Innate Immun. 2010;4(4):337-48.
2. Harder J, et al. An update on human defensins. Arch Immunol Ther Exp (Warsz). 2007;55(2):85-98.
3. Hancock REW, et al. The immunology of host defence peptides: beyond antimicrobial activity. Nat Rev Immunol. 2016;16(5):321-34.

Target Background

Function

Exhibits antimicrobial activity against Gram-negative bacteria and Gram-positive bacteria. May act as a ligand for C-C chemokine receptor CCR6. Can bind to both human and mouse CCR6 and induce chemotactic activity of CCR6-expressing cells.

Gene References into Functions