The metabolome and metabolic reactions
The metabolome is the complete set of metabolites within a cell, tissue or biological sample at any given time point. The metabolome is inherently very dynamic: small molecules are continuously absorbed, synthesised, degraded and interact with other molecules, both within and between biological systems, and with the environment (Figure 3).
Figure 3 A diagram showing the main different types of metabolic reactions that take place in a cell. These are shown as they are represented in the database Reactome.
Metabolic pathways are essentially a series of chemical reactions, catalysed by enzymes, whereby the product of one reaction becomes the substate for the next reaction. These reactions can be divided into anabolic and catabolic.