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.
All but one of the Greek city-states in Sicily were conquered by Rome in the First Punic War (264-241 BC) which was fought in Sicily between the Carthaginians and the Romans. Syracuse, the last independent Greek city-state in Sicily, was conquered by the Romans in 212 BC.