Amino Acid Sequence His-His-Leu-Gly-Gly-Ala-Lys-Gln-Ala-Gly-Asp-Val Biochem/physiol Actions Fibrinogen γ 400-411, a non-RGD containing sequence, is derived from plasmin digestion. If platelet activation is blocked with prostaglandin E1 blockade, it is required for the establishment of initial contact and support spreading but not firm adhesion on immobilized substrate. However, in activated platelets, single γ 400-411 sequence is no longer required for initiation of adhesion but becomes sufficient for firm adhesion. In contrast to the binding of whole fibrinogen, binding of fragment 400-411 does not lead to tyrosine phosphorylation for platelet proteins. |
Amino Acid Sequence His-His-Leu-Gly-Gly-Ala-Lys-Gln-Ala-Gly-Asp-Val Biochem/physiol Actions Fibrinogen γ 400-411, a non-RGD containing sequence, is derived from plasmin digestion. If platelet activation is blocked with prostaglandin E1 blockade, it is required for the establishment of initial contact and support spreading but not firm adhesion on immobilized substrate. However, in activated platelets, single γ 400-411 sequence is no longer required for initiation of adhesion but becomes sufficient for firm adhesion. In contrast to the binding of whole fibrinogen, binding of fragment 400-411 does not lead to tyrosine phosphorylation for platelet proteins. |