The Macrophage -- Eats Dead Cancer

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© Dennis Kunkel Microscopy, Inc.

A macrophage ingests bacteria as part of the immune response to infection. 

Inside this white blood cell, bacterial proteins are degraded into peptides and presented as antigens by specialized molecules on the cell's surface.

The ways in which cells turn their own and foreign proteins into antigens have gradually been revealed in recent decades.

The macrophage is the large, yellowish cell with projections; the bacterial cells are small, rod-like, blue cells.

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