Distribution of Gc Protein (Vitamin D Binding Protein) on the Surfaces of Normal Human Lymphocytes and Leukemic Lymphocytes

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Abstract
Distribution of membrane-bound Gc protein (mGc) in normal lymphocyte subpopulations and leukemic lymphocytes was studied using a rabbit antiserum specific to Gc protein. Forty to fifty percent of the normal peripheral blood mononuclear cells were stained with anti-Gc antiserum by membrane immunofluorescence, and almost all of the B cells (B1+) and NK cells (Leu 11+) were mGc-positive. Only a few resting T cells (T3+) reacted with anti-Gc, but mGc appeared in a significant number of the T cells after activation by PHA. The distribution of mGc on leukemic lymphocytes of various types nearly corresponded to that in normal lymphocyte subpopulations.

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