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Fig. 1. Redistribution of MHC class II and H-2M molecules during dendritic cell (DC) maturation. Double-colour confocal laser scanning microscopy analysis of MHC class II and H-2M molecule distributions in (A) immature (i) DCs and (B) BCG-treated DCs. In iDCs (A), intracellular class II (green) and H-2M (red) molecules are mostly co-located within vesicles (yellow). Contact with BCG for 21 hours induces DC maturation, leading to the redistribution of class II molecules to the cell surface and of H-2M-containing organelles to the cell centre (B). For each panel, a three-dimensional representation is shown. Scale bar: 5 µm.