Thirty-two percent of neuraminidase-treated DA rat spleen lymphocytes and 48% of lymph node lymphocytes possess receptors for Helix pomatia hemagglutinin (HP). Moreover, these HP-receptor-bearing cells can be separated from B cells by affinity chromatography on HP-Sepharose columns. The virtual absence of immunoglobulin (Ig) receptors and the close correlation with reported T-cell content of these lymphoid tissues suggest that HP-receptor lymphocytes are probably T cells and that HP may provide a convenient marker, for both the identification and the purification of rat T lymphocytes.
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