02277 IUPAC Gold Book - expression 10.1351/goldbook.E02277 E02277 current 1 The cellular production of the protein encoded by a particular gene. The process includes transcription of DNA, processing of the resulting mRNA product and its translation into an active protein.A recombinant gene inserted into a host cell by means of a vector is said to be expressed if the synthesis of the encoded protein can be demonstrated. DNA https://goldbook.iupac.org//terms/view/D01597 gene https://goldbook.iupac.org//terms/view/G02604 mRNA https://goldbook.iupac.org//terms/view/M03857 transcription https://goldbook.iupac.org//terms/view/T06436 translation https://goldbook.iupac.org//terms/view/T06475 vector https://goldbook.iupac.org//terms/view/V06606 PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 153 (https://doi.org/10.1351/pac199264010143) https://goldbook.iupac.org/terms/view/E02277/html https://goldbook.iupac.org/terms/view/E02277/json https://goldbook.iupac.org/terms/view/E02277/plain Citation: 'expression' 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.E02277 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. 2026-06-20T05:27:25+00:00