In enzymes, some of these amino acids form a site in the structure that catalyzes the enzymatic reaction. This site, called the active site of the enzyme, has amino acids that bind specifically to the substrate molecule, also called a ligand (Fig. 2). In a similar manner, certain sites in cell receptor proteins bind to specific ligand molecules that the receptor recognizes.
When did France's second empire end? The Second Empire ended with the swift and catastrophic defeat of  France in the Franco-Prussian war of 1870. The war was engineered  by Bismarck with the idea that Germany â¦would be united.This  included the capture by the Prussians of the Napoleon III. Then the  proclamation at Versailles of the German Empire, the loss to France  of Alsace and Lorraine, and the proclamation of the Third Republic.
Thomas Jefferson-Jefferson was a staunch anti-federalist who just happened to increase the size and power of the federal government when he completed the Louisiana Purchase with France. James Madison-Madison was president during what was called the second war of independence: the War of 1812. James Monroe-Monroe was president during the Era of Good Feelings, yet it was during his time in office that the fateful Missouri Compromise was reached. This would have a major impact on future relations between slave and free states. John Quincy Adams-Adams was the son of the second president. His election in 1824 was a point of contention due to the Corrupt Bargain that many believe resulted in his selection by the House of Representatives. Andrew Jackson-Jackson was one of the first presidents to truly use the powers given to the president.