R-group
| Formula / Notation | R-group: variable side chain; amino acid: H₂N-CH(R)-COOH |
|---|---|
| Also Known As | Side chain, substituent group, functional group variable, residue group |
What is R-group?
In organic chemistry, R-group refers to a variable substituent attached to the main chain or functional group of a molecule. In amino acids, the R-group (side chain) distinguishes one amino acid from another and determines its chemical properties.
Formula & Notation
Other Names / Synonyms: Side chain, substituent group, functional group variable, residue group
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
In organic chemistry, R-group refers to a variable substituent attached to the main chain or functional group of a molecule. In amino acids, the R-group (side chain) distinguishes one amino acid from another and determines its chemical properties.
R-groups in amino acids determine protein structure and function, making them central to biochemistry and drug design. In organic synthesis R-groups represent variable substituents allowing generalised reaction schemes. Pharmaceutical chemists modify R-groups to tune drug activity and selectivity.
Individual R-groups vary widely in toxicity and reactivity. In proteins certain R-groups participate in active sites and their modification can disrupt enzyme function.
The formula or notation for R-group is: R-group: variable side chain; amino acid: H₂N-CH(R)-COOH