Substrate

This is the term referred to a molecule which an enzyme interacts on to form an enzyme-substrate complex, through a lock and key mechanism or induced fit mechanism. This then causes a change in the structure of the enzyme by binding or cleaving parts. The substrate is then released from the enzyme as a product^[1].

References

1. ↑ Alberts B, Johnson A, Lewis J, Raff M, Roberts K, Walter P. Molecular Biology of the Cell, 5th ed. New York. Garland Science. 2008