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What is Which of these is false regarding cytokines: and explain in detail?
Cytokines mediate their effects by binding to specific high-affinity receptors on their target cells. Specific cytokines mediate specific reactions.

Other important characteristics of cytokines

Cytokines are soluble proteins produced by a wide variety of hematopoietic and non-hematopoietic cells.
They are short acting.

They are required for

Regulation of growth
Activation of the immune system
Mediation of inflammatory response