Cterminally amidated peptides were either purchased as crude powder from Research Genetics (Invitrogen, Carlsbad, CA) with the exception of INF7*, which was purchased from Anaspec (San Jose, CA), or synthesized using the FastMocTM chemistry with Fmoc-Rink amide MBHA resin 1 (Anaspec, San Jose, CA) on an Applied Biosystems (Foster City, CA) 431A peptide synthesizer using the protocol of Fisher et al (22) .