Glossary of The Cell (5th ed.) by Alberts et al. (2008)
- General term for group of covalently linked carbon and hydrogen atoms such as methyl (-CH3) or ethyl (-CH2CH3) groups. Usually exist as part of larger organic molecules. On their own they form extremely reactive free radicals.
- Alberts, B., Johnson, A., Lewis, J. Raff, M., Roberts, K. & Walter P. 2008. Molecular Biology of the Cell, 5th ed. -xxxiv + 1616 pp. Garland Science, New York.