{"id":"gamma-globulin-percent","name":"Gamma Globulin, SPEP (percent)","shortName":"Gamma Globulin %","aliases":["Gamma Globulin Percent","Gamma Globulin, Percent (SPEP)","Gamma Globulin Percent (SPEP)","Gamma Globulin (% of Total Protein)","Gamma Fraction Percent","Gamma Globulin Pct","Gamma Percent","Gamma Globulins Percent","Gamma Globulin, SPEP Percent","SPEP Gamma Percent"],"abbreviations":[],"loinc":[{"code":"13983-2","primary":true}],"specimen":"serum","units":[{"ucum":"%","display":"%"}],"referenceRanges":[{"population":"Adults","low":11.1,"high":18.8,"unit":"%","unitDisplay":"%","note":"This is the interval in the Sebia Capillarys package insert (11.1–18.8%), as quoted in Table 4 of Bikila et al. 2022. It applies to capillary electrophoresis. Published ranges for the gamma share run from about 8% to 22% (for example 9.3–20.4% on a US gel system, and 12.4–21.7% in healthy adults in Addis Ababa on a capillary system), so labs differ. Use the interval printed on your own report first.","sources":[{"title":"Establishment of Reference Intervals for Serum Protein Electrophoresis of Apparently Healthy Adults in Addis Ababa, Ethiopia","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC9419900/","publisher":"International Journal of General Medicine","year":2022}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"The share of your serum protein in the gamma zone on electrophoresis, mostly antibodies. Reported as a percent.","url":"https://bloodtesttracker.com/markers/gamma-globulin-percent","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}