Epidermal Growth Factor Receptor
The epidermal growth factor receptor (EGFR, also known as ErbB1) is the first of four members of the ErbB lineage of receptor tyrosine kinases. The ErbB family members are cell surface receptors that are expressed in most tissues throughout the body and form both homo- and heterodimers to generate signals. Heterodimers form with the other ErbB family members. For example, ErbB2 (which lacks endogenous ligands) and ErbB3 (known to have reduced kinase activity) heterodimers provide a foundation for the most robust signaling network of the ErbB family. ErbB4 is structurally similar to ErbB1 and ErbB3, but is unique in that it is the only ErbB family member capable of signaling directly from within the nucleus. EGFR is one of the most well-studied cell surface receptor...
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