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Noun
1. (cell) growth factorPhysiology
Wikipedia definition
2. Growth factorA 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. Growth factors typically act as signaling molecules between cells. Examples are cytokines and hormones that bind to specific receptors on the surface of their target cells.
Read “Growth factor” on English Wikipedia
Read “成長因子” on Japanese Wikipedia
Read “Growth factor” on DBpedia

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