Patent ID: 8669352

Claim:
A polypeptide comprising an amino acid sequence 1 11 21 31 | | | | GFSX 1 S RYSVY WX 2 RQP PGKGX 3 EWX 4 GM MWGGG STDYS 41 51 61 | | | TSLKS RLTIS KDTSK SQVX 5 L KMNSL RTDDT AMYYC 71 | VRTDG DY wherein: X 1 is G, A, V, L, I, P, F, M, W, C, N, Q, S, T, Y, D, E, K, R or H; X 2 is G, A, V, L, I, P, F, M, W, C, N, Q, S, T, Y, D, E, K, R or H; X 3 is G, A, V, L, I, P, F, M, W, C, N, Q, S, T, Y, D, E, K, R or H; X 4 is G, A, V, L, I, P, F, M, W, C, N, Q, S, T, Y, D, E, K, R or H; and X 5 is G, A, V, L, I, P, F, M, W, C, N, Q, S, T, Y, D, E, K, R or H (SEQ ID NO. 1).