PathwayStep5361 PathwayStep5366 PathwayStep5336 PathwayStep5339 PathwayStep5338 PathwayStep5345 PathwayStep5342 PathwayStep5349 PathwayStep5354 PathwayStep5352 PathwayStep5350 PathwayStep5327 PathwayStep5329 PathwayStep5334 PathwayStep5333 Trans-autophosphorylation of p-Y877-ERBB2 heterodimers