In this article we will discuss about the electron transport system in bacterial photosynthesis. In the phototrophic bacteria, cytochrome a and other type of cytochrome oxidase are not present because photosynthesis takes place under anaerobic conditions and there is no need of interaction with molecular O2. The electron transport system i.e. the mechanism of reduction of NADP to NADPH + [...]
In this article we will discuss about the metabolism of nitrogen fixation. Nitrogenase enzyme, which is chiefly associated with fixing of nitrogen, is inactivated by oxygen. This inactivation may be reversible or irreversible, the latter clearly being a more serious problem. How it arose is an open question? One suggestion is that oxygen sensitivity results from evolution of nitrogenase in [...]
In this article we will discuss about the nitrogen fixation mechanisms in microorganisms. 1. Nitrogenase Types, Structure and Function: The biological conversion of atmospheric nitrogen to ammonia taken place with the help of an enzyme called Nitrogenase. This enzyme is anaerobic in nature and when it comes in contact with oxygen or air, it becomes inert. The proteinaceous enzyme is [...]