ATP

• A singel molecule of adenosine triphosphate (ATP) is a nucleotide deritaive and is formed from a molecule of ribose, a molecule of adenine and three phosphate groups.
• Hydrolysis of ATP to ATP and an inorganic phosphate group (Pi) is catalysed by the enzyme ATP hydrolase.
• The hydrolysis ofATP can be coupled to energy-requiring reactions within cells.
• The inorganic phosphate released during the hydrolysis of ATP can be used to phosphorylate other compounds, often making them more reactive.
• ATP is resynthesised by the condensation of ADP and Pi. This reaction is catalysed by the enzyme ATP synthase during photosynthesis, or during repsiration.