Dirmikis SM, Justice SK, Munro DS. Association of the long-acting thyroid stimulator protector with the immunoglobulin G fraction of serum from patients with thyrotoxicosis.
BIOCHIMICA ET BIOPHYSICA ACTA 1975;
379:239-46. [PMID:
1115798 DOI:
10.1016/0005-2795(75)90027-6]
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Abstract
Both the long-acting thyroid stimulator and the long-acting thyroid stimulator protector are associated with the immunoglobulin G fraction of human serum proteins. Fractionation of globulins by (NH4)2SO4 precipitation and DEAE-cellulose chromatography showed that the protector activity was associated with subfractions of differing electrophoretic mobility. Attempts to concentrate the protector in immunochemically pure immunoglobulin G prepared in this way may fail because of loss of protector activity with other immunoglobulin G fractions. Gel filtration on Sephadex G-150 indicated that protector activity was associated with 7-S proteins.
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