We tested 20 protegrins against Chlamydia trachomatis serovar L2 (L2/434/Bu). Five of the protegrins had native structures; the others included nonamidated, enantiomeric, and truncated variants and peptides with <2 disulfide bonds. Antichlamydial activity resided principally in residues 5 to 15 of native protegrin PG-1, and optimal activity required both intramolecular disulfide bonds.
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Yasin et al. (1996) studied this question.
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