Patent ID: 8563688

Claim:
A peptide or peptide derivative comprising: (i) WDLYFEIVW (SEQ ID NO: 322); or (ii) a variant amino acid sequence comprising one, two, three or four amino acid substitutions in WDLYFEIVW (SEQ ID NO: 322), said variant amino acid sequence comprising X 1 X 2 X 3 YX 4 EX 5 X 6 X 7 , wherein X 1 is W, L, or P; X 2 is D or S, X 3 is L or F, X 4 is F, Phg, L, Ebw, Pff, Thi, 1Ni, Hfe, Ece or Cha, X 5 is I or F, X 6 is 5, V or G, and X 7 is W or L (SEQ ID NO: 323) or (iii) the retro-inverso variant of the peptide or peptide derivative of either one of parts (i) and (ii), wherein said peptide or peptide derivative has procoagulant activity.