Magnesium is an essential element in biological systems. Magnesium occurs typically as the Mg2+ ion. It is an essential mineral nutrient (i.e., element) for life and is present in every cell type in every organism. For example, ATP (adenosine triphosphate), the main source of energy in cells, must be bound to a magnesium ion in order to be biologically active. What is called ATP is often actually Mg-ATP. Similarly, magnesium plays a role in the stability of all polyphosphate compounds in the cells, including those associated with DNA- and RNA synthesis.
Over 300 enzymes require the presence of magnesium ions for their catalytic action, including all enzymes utilizing or synthesizing ATP, or those that use other nucleotides to synthesize DNA and RNA.
The MG F and later MG TF are mid-engined, rear wheel drive roadster cars produced from 1995 until 2011. The MG F, designed and produced by Rover Group, was the first all-new car to bear the MG marque since the MG MGB that was produced from 1962 to 1980. Production of the MG TF paused in 2005, when MG Rover went into receivership, and resumed in 2007 under the company's new owners Nanjing Automobile of China.