Immunohistochemical evidence for the presence of intact 5H2 in the thrombus.

Hematoxylin-eosin staining of control thrombus induced by prolonged exposure (4 minutes) to xenon light (A) and thrombosis promoted by 10 mg/kg intravenous 5H2 (B). Immunohistochemical stainings of control thrombus (C) and of 5H2-promoted thrombus (D). Insert (original magnification × 16) shows association of 5H2 with individual platelets inside the thrombus.