Mast cell,computer artwork. Mast cells are a type of leucocyte (white blood cell). They contain the chemical mediators histamine,serotonin and heparin. Histamine is released from mast cells in response to an allergen,causing a localized inflammatory immune response. When an allergen is encountered,B cells (not seen) produce immunoglobulin E (IgE) antibodies (Y-shaped). These bind to protein receptor molecules on the surface of the mast cell. When two antibodies are cross-linked with an antigen (orange) the cell is activated to release its histamine by exocytosis (lower right) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Hybrid Medical Animation |
Bildgröße: | 4132 px × 4144 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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