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.
Ragusa [raËÉ¡uËza] listen (helpÂ·info) (Sicilian: Rausa; Latin: Ragusia) is a city and comune in southern Italy.It is the capital of the province of Ragusa, on the island of Sicily, with around 75,000 inhabitants.It is built on a wide limestone hill between two deep valleys, Cava San Leonardo and Cava Santa Domenica.he origins of Ragusa can be traced back to the 2nd millennium BC, when in its area there were several settlements of the ancient Sicels. The current Ragusa Ibla lies probably on one of them, identified as Hybla Heraea.