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.
Sicily's coasts offer some fascinating features. Capo Bianco, near the archeological site of Eraclea Minoa (and the town of Montallegro) at the mouth of the Platani River west of Agrigento, has a beach in the shadow of white cliffs.