Abstract
Activation of receptor tyrosine kinases (RTK), such as those belonging to the human epidermal growth factor receptor (HER) family, occurs only after receptor dimerization, which is a crucial step for cellular signal transduction and diversification. The HER family includes four members (EGFR/HER1, HER2, HER3, and HER4) that can homodimerize or heterodimerize. Here, we describe immunoassays based on time-resolved Förster resonance energy transfer (TR-FRET) to profile EGFR-EGFR, HER2-HER2, and EGFR-HER2 dimers directly in tumor samples.
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