Patent ID: 6849603

Claim:
An isolated and purified peptide of the RY domain having an amino acid sequence of general formula I comprising a sequence of the following amino acids: x 1 —x 2 —x 3 —x 4 —x 1 —x 4 —x 4 —x 3 —x 1 I x 1 =Phe, Tyr, or any amino acid having a substituted aromatic residue; x 2 =Glu, Asp, Ser, or any amino acid having a —(CH 2 ) n —COO residue, wherein n=0-3; x 3 =Asp, Thr, any aliphatic amino acid or any of amino acids X 4 ; and x 4 =Arg, Lys, or any amino acid having a —(CH 2 ) n —NH 3 + residue, or a —(CH 2 ) n —NH—C(NH 3 + )NH 2 residue wherein n=0-4.