Also cytokine. From Greek kytos, cell and Latin suffix -ina that can denote matter, substance, belonging or relationship. It is a fundamental protein in the communication between the cells of our organisms and also and especially among those of the immune system. It is as important as hormones or neurotrasmisors. In addition to the immune system cytokines are involved in many other biological functions such as the birth, growth and death of other cells.
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