Catalog number: 247 - OOPA00048-5UG
Product Category: Business & Industrial > Science & Laboratory
Size: 5ug
PROTP81534-1
Defensins (alpha and beta) are cationic peptides with a broad spectrum of antimicrobial activity that comprise an important arm of the innate immune system. The α-defensins are distinguished from the β-defensins by the pairing of their three disulfide bonds. To date, six human β-defensins have been identified; BD-1, BD-2, BD-3, BD-4, BD-5 and BD-6. β-defensins are expressed on some leukocytes and at epithelial surfaces. In addition to their direct antimicrobial activities, they can act as chemoattractants towards immature dendritic cells and memory T cells. The β-defensin proteins are expressed as the C-terminal portion of precursors and are released by proteolytic cleavage of a signal sequence and in some cases, a propeptide sequence. β-defensins contain a six-cysteine motif that forms three intra-molecular disulfide bonds. Recombinant human BD-3 is a 5.1 kDa protein containing 45 amino acid residues.
70903
Fully biologically active when compared to standard. The ED50 as determined by anti-microbial activity against E.coli. is less than 30 μg/ml, corresponding to a specific activity of > 33.3 IU/mg.