“…Peptides corresponding to all known sequences have either been purified from natural sources [13,[34][35][36][37][38][39], after processing of the respective precursors, or have been obtained by chemical synthesis based on the sequence deduced from cDNA [26,27,29,32,33]. At present they include rabbit CAPI8(106 142) [39], human FALL-39/CAP18 [32,33], PMAP-36 [26] and PMAP-37 [29], all of which are mostly s-helical; two Trpcontaining peptides, indolicidin [36] and PMAP-23 [27]; the Pro-and Arg-rich Bac5 [12], Bac7 [12], PR-39 [13] and prophenin [38]; the cyclic dodecapeptide [34] and protegrins [37] which are loop-forming molecules with one and two disulfide bonds, respectively. The sequence of the Pro-and Arg-rich peptides (Fig.…”