If you look at a big metabolic chart, like a detailed road map, youâll see that PFK is the first âcommittedâ enzyme for glycolysis. It is tempting to think that hexokinase/glucokinase should be the one, but the product, Glucose 6-phosphate has man...
The first settlement in the region of present-day Cairo was al-Fustat, founded in A. D. 641 as a military encampment by the Arabic commander 'Amr ibn al-'As. Under the dynasties that ruled Egypt over the following centuries, the town grew into a major port city. In A. D. 969 Jawhar, the leader of an Islamic sect called the Fatimids, founded a new city near al-Fustat, initially naming it al-Mansuriyah (its name was later changed to al-Qahirah, or Cairo). When the Fatimids became the rulers of Egypt, founding a dynasty that lasted for two centuries, Cairo became their capital. When Saladin, a Sunni Muslim, defeated the Crusaders and founded the Ayyubid dynasty in the twelfth century, he retained Cairo as his capital, and it became the center of a vast empire.
Between 1882 and 1937, the population of Cairo more than tripledâfrom 347,000 to 1.3 million âand its area increased from 10 to 163 square kilometres (4 to 63 sq mi).