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.
Swastika. Third Reich â The Third Empire. It refers to Hitlerâs name for his German Empire as a successor to the 1st Empire of the Roman Emperors (First Reich) and the Empire of Bismarck in 19th century Germany (Second Reich). Weimar Republic â The German democratic government from 1919-1934 formed after Germanyâs defeat in World War I.