, Volume 23, Issue 3, pp 207-210

Purification and characterization of the antimicrobial peptide, ostricacin

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An antimicrobial peptide, ostricacin-1, has been purified and characterized from ostrich leukocytes. The peptide has a mass of 4011 and contained 36 residues, including 3 intramolecular cystine disulfide bonds. Ostricacin-1 has a primary sequence homology to the β-defensin family and was active at 6.7 μg ml−1 against E. coli and Staphylocccus aureus in vitro.