[1] CNR, Inst Biostruct & Bioimaging, I-80138 Naples, Italy
[2] Univ Naples Federico II, Interuniv Ctr Res Bioact Peptides CIRPeB, Dept Pharm, Naples, Italy
[3] Univ Salerno, Dept Ind Engn, I-84084 Fisciano, Sa, Italy
[4] CNR, Inst Crystallog, I-70126 Bari, Italy