(DNA) A fragment of known size used as reference for analytical purposes.
(genetic) A gene
with known phenotype and mapped position.
(chromatography) A reference substance co-chromatographed with the sample to assist in identifying
PAC, 1992, 64, 143
(Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992))
on page 159
PAC, 1993, 65, 819
(Nomenclature for chromatography (IUPAC Recommendations 1993))
on page 837