An enzyme inhibitor is a molecule that binds to an enzyme and decreases its activity. Since blocking an enzyme's activity can kill a pathogen or correct a metabolic imbalance, many drugs are enzyme inhibitors. They are also used in pesticides. Not all molecules that bind to enzymes are inhibitors; enzyme activators bind to enzymes and increase their enzymatic activity, while enzyme substrates bind and are converted to products in the normal catalytic cycle of the enzyme.
The binding of an inhibitor can stop a substrate from entering the enzyme's active site and/or hinder the enzyme from catalyzing its reaction. Inhibitor binding is either reversible or irreversible. Irreversible inhibitors usually react with the enzyme and change it chemically (e.g. via covalent bond formation). These inhibitors modify key amino acid residues needed for enzymatic activity. In contrast, reversible inhibitors bind non-covalently and different types of inhibition are produced depending on whether these inhibitors bind to the enzyme, the enzyme-substrate complex, or both.
Aube (French pronunciation: [ob]) is a French department in the Alsace-Champagne-Ardenne-Lorraine region of north-eastern France. As with sixty departments in France, this department is named after a river: the Aube. With 305,606 inhabitants (2012), Aube is 76th department in terms of population. The inhabitants of the department are known as Aubois or Auboises
The department was constituted as it is today by a decree of the National Assembly of 15 January 1790.
The Aube department is located in the south-west side of the Alsace-Champagne-Ardenne-Lorraine region. It borders the departments of Marne in the north (about 130 km long), Haute-Marne to the east (about 100 km long), Côte-d'Or in the south-east (about 45 km long), Yonne in the south-west (about 175 km long), and Seine-et-Marne in the west (about 45 km long).
Within the department regions of natural or traditional countryside can be identified as follows: