A reduced and alkylated 52/48 kDa fragment beginning at amino acid residue 449 contains the domain interacting with platelet glycoprotein Ib - Fujimura, Y; Titani, K; Holland, L Z; Russel, S R; Roberts, J R; Elder, J H; Ruggeri, Z M; Zimmerman, T S; Von Willebrand, Factor (J Biol Chem, 1986)