DC cell membrane veils and microvilli. (A) Differential interference contrast micrograph of live human mature DCs showing membrane veils. (B) Confocal micrograph of live DCs labeled with the cytoplasmic dye CMFDA to demonstrate cytoplasmic content of the veils (objective: C-Apochromat 63×/1.2 W Corr excitation: 488 nm; emission band pass filter: 505-550 nm). (C,D) Scanning electron micrographs of fixed DCs. Arrowheads indicate veils; arrow, microvilli. The line in panel C circumscribes the DC body (excluding veils). Bars represent 10 μm.