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a polypeptide of 11,600 Da that forms the light chain of class 1 major histocompatibility antigens and can therefore be detected on all cells bearing these antigens. Free β-microglobulin is found in the blood and urine of patients with certain diseases, including Wilson disease, cadmium poisoning, and renal tubular acidosis.
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Prognostic impact of b-microglobulin in patients with non-gastric mucosa-associated lymphoid tissue lymphoma.Leuk Lymphoma 2015; 56(3): 688-93.