Fluorescence images comparing F4/80 positive cells and albumin positive cells. A: Merged image showing green F4/80 positive cells and red microsphere positive cells. B: Same region as in 'A' photographed under ultraviolet optics to show DAPI positive nuclei. C: Merger of images shown in 'A' and 'B', demonstrating ovoid nuclear morphology of F4/80 and microsphere positive cells. D: Immunoreactivity for fluorescein labelled albumin. E: Same section as 'D', but ultraviolet optics reveal DAPI labelled nuclei. F: Merger of 'D' and 'E' demonstrating that albumin positive cells contain large round nuclei. Calibration bar in F = 50 μm for all images.