NCIt definition : Receptor tyrosine-protein kinase erbB3 (1342 aa, 148 kDa) is encoded by the human
ERBB3 gene. This protein plays a role in protein amino acid phosphorylation.;
NCIt note : HER3/erbB3. Member of the EGF receptor (erbB) family. Receptor for NDF/heregulin (Neu
differentiation factor); heterodimerizes with other type I receptor tyrosine kinases.
It is overexpressed frequently in several common solid tumors, including in breast
cancer.;