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Figure 4 Cell-specific staining of the occluded vein graft. Staining of serial sections, with antibodies specific to myosin heavy chain (A), h-caldesmon (B), -actin (C) and desmin (D), shows that the occluded veins were highly cellular. All are shown as red reaction product. Magnifications: A, B, C, 10x; D, 15x, reduced by 65%.