Growth Factor
A growth factor is a naturally occurring substance capable of stimulating cellular growth, proliferation and cellular differentiation. Usually it is a protein or a steroid hormone. Growth factors are important for regulating a variety of cellular processes.
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Famous quotes containing the words growth and/or factor:
“It is in the comprehension of the physically disabled, or disordered ... that we are behind our age.... sympathy as a fine art is backward in the growth of progress ...”
—Elizabeth Stuart Phelps (1844–1911)
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—Dorothy H. Cohen (20th century)