Localization of the cross-linking sites of RGD and KQAGDV peptides to the isolated fibrinogen receptor, the human platelet integrin glycoprotein IIb/IIIa. Influence of peptide length - Calvete, JJ; Schafer, W; Mann, K; Henschen, A; Gonzalez-Rodrfguez, J (Eur J Biochem, 1992)