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Bursting with activity, this allergy mast cell model captures the moment of degranulation, when histamine granules spill through the membrane. A large rounded nucleus sits at the center, ringed by granule-filled pockets, while Y shaped antibodies, a clumped allergen and streams of tiny released granules spread from the irregular, lumpy surface. Stylized for clarity, it gives a cell biology or immunology class a vivid look at allergic reactions, and makes an intriguing conversation piece on a science shelf.

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