Patent ID: 7122517

Claim:
A polypeptide consisting of a sequence of a general formula selected from the group consisting of: (a) General formula I: PF(R1)(R2)CN(R3)(R4)(R5)VC(R6)(R7)A (SEQ ID NO: 1) R1 is selected from the group consisting of L, M, A, V, norL, and I; R2 is selected from the group consisting of F and Y; R3 is selected from the group consisting of I, V, L, norL, A, and P; R4 is selected from the group consisting of N, G, and H; R5 is selected from the group consisting of N, D, Q, and E; R6 is selected from the group consisting of N, Y, and H; and R7 is selected from the group consisting of F and Y.