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.
Nazi Germany made increasingly aggressive territorial demands, threatening war if they were not met. It seized Austria and Czechoslovakia in 1938 and 1939. Hitler made a pact with Joseph Stalin and invaded Poland in September 1939, launching World War II in Europe.ommon English terms are Nazi Germany and Third Reich. The latter, adopted by Nazi propaganda, was first used in a 1923 book by Arthur Moeller van den Bruck. The book counted the Holy Roman Empire (962â1806) as the first Reich and the German Empire (1871â1918) as the second.