We provide a model to visualize and verify PPI Networks using Gene Expression and Gene Ontology data. A clustered dual (central/peripheral) visualization model is provided and user can cluster PPI Networks according to biological semantics rather than graph-theoretical measures. Another novelty of our work is that interaction reliabilities are taken into account in the layout computations. For this purpose, weighted modifications on popular graph layouts are employed. Bidirectional verification between PPI Networks and Gene Ontology/Gene Expression data can be performed using our visuals.