side chain

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English[edit]

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Alternative forms[edit]

Noun[edit]

side chain (plural side chains)

  1. (organic chemistry) That part of a molecule attached to some core structure; a radical.
  2. (biochemistry) Any of the variable parts of amino acids that extend from the peptide backbone in proteins; they are referred to as R-groups, which branch off the backbone at the alpha carbon (Cα).