06763 IUPAC Gold Book - entatic state 10.1351/goldbook.ET06763 ET06763 current 1 A state of an atom or group which, due to its binding in a protein, has its geometric or electronic condition adapted for function. It is derived from entasis (Greek), meaning tension. PAC, 1997, 69, 1251. 'Glossary of terms used in bioinorganic chemistry (IUPAC Recommendations 1997)' on page 1272 (https://doi.org/10.1351/pac199769061251) https://goldbook.iupac.org/terms/view/ET06763/html https://goldbook.iupac.org/terms/view/ET06763/json https://goldbook.iupac.org/terms/view/ET06763/plain Citation: 'entatic state' 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.ET06763 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. 2026-08-04T04:08:22+00:00