Defensins are small cysteine-rich cationic proteins found in both vertebrates and invertebrates. They have also been reported in plants. They are, and function as, host defense peptides. They are active against bacteria, fungi and many enveloped and nonenveloped viruses. They consist of 18-45 amino acids including six (in vertebrates) to eight con...
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http://en.wikipedia.org/wiki/Defensin
(de-fen´sin) any of a group of small antimicrobial proteins that occur in neutrophils and macrophages. They are active against fungi and bacteria. Defensins attach to the cell membrane and create pores through which the contents of the cell can escape.
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http://www.encyclo.co.uk/local/21001
Defensin: A family of potent antibiotics made within the body by neutrophils (a type of white blood cell) and macrophages (cells that can engulf foreign particles). The defensins play important roles against invading microbes. They act against bacteria, fungi and viruses by binding to their membranes and increasing membrane permeability. On a chemi...
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http://www.medterms.com/script/main/art.asp?articlekey=26300
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