03705 IUPAC Gold Book - marker 10.1351/goldbook.M03705 M03705 current 1 (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 the components. DNA https://goldbook.iupac.org//terms/view/D01597 chromatography https://goldbook.iupac.org//terms/view/C01075 gene https://goldbook.iupac.org//terms/view/G02604 phenotype https://goldbook.iupac.org//terms/view/P04542 PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 159 (https://doi.org/10.1351/pac199264010143) PAC, 1993, 65, 819. 'Nomenclature for chromatography (IUPAC Recommendations 1993)' on page 837 (https://doi.org/10.1351/pac199365040819) Orange Book, 2nd ed., p. 97 (https://media.iupac.org/publications/analytical_compendium/) https://goldbook.iupac.org/terms/view/M03705/html https://goldbook.iupac.org/terms/view/M03705/json https://goldbook.iupac.org/terms/view/M03705/plain Citation: 'marker' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.M03705 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-01T10:04:30+00:00