Abstract
The study of oncogenes has provided numerous insights, not only into the mechanisms by which growth regulation becomes uncontrolled in cancer cells, but also into signal transduction processes which regulate the orderly proliferation and maturation of cells. c-fes/fps is a cellular oncogene which has been transduced frequently by mammalian and avian retroviruses. There are several features about Fes which suggest it may play a unique role in myeloid cell growth and differentiation. While it contains a tyrosine kinase and SH2 domain, there is no SH3 domain or carboxy terminal regulatory phosphotyrosine such as found in the Src family of kinases. Fes has a unique N-terminal domain of over 400 amino acids of unknown function. It has been implicated in signaling by a variety of hematopoietic growth factors, and is predominantly a nuclear protein.
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