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Neuropeptide Y (NPY) and polypeptide YY (PYY) are two ubiquitous neuropeptides, found in brain and intestines, respectively, where they exert important regulatory functions. In this study, a new member of the YY family recently isolated from amphibian skin, skin-PYY (SPYY), is reported to inhibit irreversibly the proliferation of a broad spectrum of pathogenic microorganisms. NPY and PYY are shown...
Pardaxin, an amphipathic polypeptide secreted by the Red Sea flatfish Pardachirus marmoratus whose sequence is NH 2 -G-F-F-A-L-I-P-K-I-I-S-S-P-L-F-K-T-L-L-S-A-V-G-S-A-L-S-S-S-G-G-Q-E, was synthesized by the solid-phase method. The structure was verified by sequencing. The synthetic polypeptide changed the resistance of lipid bilayers by forming pores. At 10 -7 -10 -8...
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