1. (@D01597@) A fragment of known size used as reference for analytical purposes.
  2. (genetic) A @G02604@ with known @P04542@ and mapped position.
  3. (@C01075@) A reference substance co-chromatographed with the sample to assist in identifying the components.
Orange Book, 2nd ed., p. 97 [Terms] [Book]
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 159 [Terms] [Paper]
PAC, 1993, 65, 819. (Nomenclature for chromatography (IUPAC Recommendations 1993)) on page 837 [Terms] [Paper]