Muc4–ErbB2 Complex Formation and Signaling in ... - Semantic Scholar

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Molecular Biology of the Cell Vol. 17, 2931–2941, July 2006

Muc4–ErbB2 Complex Formation and Signaling in Polarized CACO-2 Epithelial Cells Indicate That Muc4 Acts as an Unorthodox Ligand for ErbB2 Victoria P. Ramsauer,* Vanessa Pino,† Amjad Farooq,† Coralie A. Carothers Carraway,† Pedro J.I. Salas,* and Kermit L. Carraway* Departments of *Cell Biology and Anatomy and †Biochemistry and Molecular Biology, University of Miami School of Medicine, Miami, FL 33101 Submitted September 27, 2005; Revised March 14, 2006; Accepted April 11, 2006 Monitoring Editor: Ben Margolis

Muc4 serves as an intramembrane ligand for the receptor tyrosine kinase ErbB2. The time to complex formation and the stoichiometry of the complex were determined to be

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