13420 IUPAC Gold Book - lymphosum 10.1351/goldbook.13420 13420 current 1 Sum of B cells + T cells + natural killer (NK) cells determined separately (by flow cytometry), compared to the total number of lymphocytes. Used as a check on accuracy in counting the proportion of cell types, e.g., a value of \(\pu{(100 \pm 10)\%}\) being acceptable and reflecting the uncertainty of the method. B cells https://goldbook.iupac.org/terms/view/12937 T cells https://goldbook.iupac.org/terms/view/13724 flow cytometry https://goldbook.iupac.org/terms/view/13152 lymphocytes https://goldbook.iupac.org/terms/view/13399 natural killer (NK) cells https://goldbook.iupac.org/terms/view/13499 PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1207 (https://doi.org/10.1351/PAC-REC-11-06-03) https://goldbook.iupac.org/terms/view/13420/html https://goldbook.iupac.org/terms/view/13420/json https://goldbook.iupac.org/terms/view/13420/plain Citation: 'lymphosum' 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.13420 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. 2026-05-10T15:22:47+00:00