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.
Catania is located on the east coast of the main island of Sicily, at the foot of the Mount Etna. As observed by Strabo the location of Catania at the foot of Mount Etna was both a source of benefits and of evils.On the one hand, the violent outbursts of the volcano from time to time desolated great parts of the city's territory.s observed by Strabo the location of Catania at the foot of Mount Etna was both a source of benefits and of evils. On the one hand, the violent outbursts of the volcano from time to time desolated great parts of the city's territory.