Ras Pathway. Ras is a membrane-associated guanine nucleotide-binding protein that is normally activated in response to the binding of extracellular signals, such as growth factors, RTKs (Receptor Tyrosine Kinases), TCR (T-Cell Receptors) and PMA (Phorbol-12 Myristate-13 Acetate).
Sicily Description. Sicily is Italy's largest island and the largest island in theMediterranean Sea. It's also a geographical and political region of Italy, famed for its beautiful beaches, cuisine, and fascinating history.
Maps of Sicily's main cities, archaeological sites and islands. 1  Map of Sicily. 2  Map of Palermo. 3  Map of Catania. 4  Map of Syracuse. 5  Map of Taormina. 6  Map of Agrigento and the Valley of the Temples.7  Map of the archaeological site of Selinunte. 8  Map of Villa Romana del Casale in Piazza Armerina. 9  Map of the the Aeolian Islands.aps of Sicily's main cities, archaeological sites and islands. 1  Map of Sicily. 2  Map of Palermo. 3  Map of Catania. 4  Map of Syracuse. 5  Map of Taormina. 6  Map of Agrigento and the Valley of the Temples. 7  Map of the archaeological site of Selinunte. 8  Map of Villa Romana del Casale in Piazza Armerina.