Patent ID: 7589063

Claim:
A peptide comprising the sequence CX 3 X 4 Z 1 Z 2 X 5 TWX 6 C (SEQ ID NO:1), wherein: X 3 is R, H, L or W; X 4 is M,F, or I; X 5 is any amino acid; X 6 is D, E, I, L or V; Z 1 is G, A, V, L, I, P, F, W or M; and Z 2 is S, T, C, Y, N, Q, F, W, K, R, H, D, E, 5-aminovaleric acid (Ava) or 5-aminolevulinic acid (Als) or an amino acid with a positively charged side chain; wherein the peptide binds to the erythropoietin receptor.