{"id":"alpha-2-globulin","name":"Alpha-2 Globulin, SPEP (g/dL)","shortName":"Alpha-2 Globulin","aliases":["Alpha 2 Globulin","A2 Globulin","Alpha-2 Globulins","Alpha-2 Globulin g/dL","SPEP Alpha 2","Alpha 2 Glob","Alpha-2 Globulin (SPEP)","Alpha2 Globulin","Alpha 2 Globulin Fraction","Alpha-2 Globulin, Serum"],"abbreviations":[],"loinc":[{"code":"2868-8","primary":true}],"specimen":"serum","units":[{"ucum":"g/dL","display":"g/dL"},{"ucum":"g/L","display":"g/L"}],"referenceRanges":[{"population":"Adults","low":0.48,"high":1.05,"unit":"g/dL","unitDisplay":"g/dL","note":"ARUP Laboratories interval (quantitative capillary electrophoresis), printed without an age or sex split. MedlinePlus gives 0.6-0.9 g/dL as an example range and ABIM lists 0.5-0.9 g/dL. Labs using gel methods or other capillary systems print different limits, so use the interval on your own report first.","sources":[{"title":"Protein Electrophoresis, Serum (test 0050640)","url":"https://ltd.aruplab.com/Tests/Pub/0050640","publisher":"ARUP Laboratories"},{"title":"Protein electrophoresis - serum","url":"https://medlineplus.gov/ency/article/003540.htm","publisher":"MedlinePlus (National Library of Medicine)","year":2026},{"title":"ABIM Laboratory Test Reference Ranges, January 2026","url":"https://www.abim.org/Media/bfijryql/laboratory-reference-ranges.pdf","publisher":"American Board of Internal Medicine","year":2026}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The amount of serum protein in the alpha-2 zone on electrophoresis, including haptoglobin, alpha-2-macroglobulin and ceruloplasmin. Reported in g/dL.","url":"https://bloodtesttracker.com/markers/alpha-2-globulin","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}