As the name implies, a variable is something which can change. A variable is a way of referring to a memory location used by a computer program. A variable is a symbolic name for this physical location. This memory location contains values, like numbers, text or more complicated types.
The term cytokine is derived from a combination of two Greek words - cyto meaning cell and kinos meaning movement. Cytokines are cell signalling molecules that aid cell to cell communication in immune responses and stimulate the movement of cells towards sites of inflammation, infection and trauma. Cytokines exist in peptide, protein and glycoprotein (proteins with a sugar attached) forms.
Cytokines produced by leukocytes are sometimes called interleukins, while those produced by lymphocytes may be referred to as lymphokines. Cytokines typically are not stored within the cell but instead are synthesized âon demand,â often in response to another cytokine. Once secreted, the cytokine binds to a specific protein molecule, called a receptor, on the surface of the target cell, an