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Nrg-1 ligand and receptor localizations: (top panel) tissues expressing Nrg1 during pre and post-natal life. (Middle panel) ErbB2 and ErbB4 expression profiles. (Bottom panel) ErbB3 and ErbB4 expression profiles. Disease expression indicates tissues overexpressing Nrg (top) or its receptors (middle, bottom) concomitant with indicated diseases.
