A(n) cytokine is any soluble, low molecular-weight protein or glycoprotein released by one population of cells that acts as an intercellular communication/signaling molecule on a different group of cells.
Small, flexible proteins known as cytokines play a crucial role in cell signaling. Peptides like cytokines may be unable to penetrate the lipid bilayer of cells to reach the cytoplasm. As immunomodulating agents, cytokines have just been demonstrated to participate in autocrine, and paracrine, including endocrine signaling.
Small proteins called cytokines play a key role in regulating the development and activity of blood and immune system cells. They instruct the immune response to function once they are released. All blood cells as well as other cells that support the body's immunological and inflammatory responses are affected by cytokines.
Therefore, A(n) cytokine is any soluble, low molecular-weight protein or glycoprotein released by one population of cells that acts as an intercellular communication/signaling molecule on a different group of cells.
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