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Beta defensins are a family of vertebrate defensins. The beta defensins are antimicrobial peptides implicated in the resistance of epithelial surfaces to microbial colonization. Defensins are 2-6 kDa, cationic, microbicidal peptides active against many Gram-negative and Gram-positive bacteria, fungi, and enveloped viruses, containing three pairs of intramolecular disulfide bonds. On the basis of their size and pattern of disulfide bonding, mammalian defensins are classified into alpha, beta and theta categories. Every mammalian species explored thus far has beta-defensins. In cows, as many as 13 beta-defensins exist in neutrophils. However, in other species, beta-defensins are more often produced by epithelial cells lining various organs (e.g. the epidermis, bronchial tree and genitourina

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  • Beta defensin (en)
  • Β-defensyny (pl)
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  • Beta defensins are a family of vertebrate defensins. The beta defensins are antimicrobial peptides implicated in the resistance of epithelial surfaces to microbial colonization. Defensins are 2-6 kDa, cationic, microbicidal peptides active against many Gram-negative and Gram-positive bacteria, fungi, and enveloped viruses, containing three pairs of intramolecular disulfide bonds. On the basis of their size and pattern of disulfide bonding, mammalian defensins are classified into alpha, beta and theta categories. Every mammalian species explored thus far has beta-defensins. In cows, as many as 13 beta-defensins exist in neutrophils. However, in other species, beta-defensins are more often produced by epithelial cells lining various organs (e.g. the epidermis, bronchial tree and genitourina (en)
  • β-defensyny – białka kationowe zaliczane do peptydów antydrobnoustrojowych o długości 36-42 aminokwasów, których mostki dwusiarczkowe rozmieszczone są w pozycjach C1-C5, C2-C4, C3-C6.Do ludzkich β-defensyn należy hBD-1 wytwarzana przez komórki nabłonkowe (m.in. oskrzeli, języka, szyjki macicy, okrężnicy, dróg moczowych), a także neutrofile i leukocyty oraz hBD-2 i hBD-3, wytwarzane przez keratynocyty (w reakcjach zapalnych, głównie w łuszczycy. hBD-4 została zidentyfikowana wyłącznie przez badaczy genomowych baz danych; wykazuje działanie antydrobnoustrojowe w stosunku do różnych bakterii i grzybów drożdżopodobnych oraz pobudza migrację monocytów. β-defensyna po raz pierwszy została wyizolowana z języka krowy w 1991 roku i nazwana TAP (tracheal antimicrobial peptide). Zawierała sześć cyste (pl)
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  • Beta defensin (en)
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