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From Biology-Online Dictionary | Biology-Online Dictionary
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noun, plural: cytokines

Any of a group of proteins, peptides, or glycoproteins secreted by cells of the immune system, and act as regulators of cells involved in the generation of immune response


Examples of cytokines are erythropoietin, interferon, interleukins, and G-CSF.

Word origin: Greek cyto (cell) + kinos (movement)