?:definition
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The process in which a receptor is activated by another receptor. Receptor transactivation can occur through different mechanisms and includes cross-talk between signaling pathways where one receptor activates a receptor for a different ligand, and also activation of subunits within a receptor oligomer. [GOC:al, GOC:bf, GOC:BHF, PMID:16870826, PMID:21063387]
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