Side-chain

Side-chain, side chain, or sidechain may refer to:


 * Side chain, a chemical group attached to the main chain or backbone of a molecule, such as a protein
 * Substituent, an atom or group of atoms substituted in place of a hydrogen atom on the parent chain of a hydrocarbon
 * Side-chaining, an effect in digital audio processing
 * Sidechain (ledger), a designation for a particular blockchain
 * "Sidechain", a song by Knuckle Puck from the album 20/20