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.
Province of Messina. Messina (Italian: Provincia di Messina; Sicilian: Pruvincia di Missina) was a province in the autonomous island region of Sicily in Italy. Its capital was the city of Messina. It was replaced by the Metropolitan City of Messina.