Beschreibung:
<jats:title>Abstract</jats:title><jats:p>TcR1<jats:sup>+</jats:sup> T cells in peripheral blood have been shown to express in an exclusive fashion either the TiγA or the δTCS1 epitope. Here, we characterize a subset of TcR1<jats:sup>+</jats:sup> T cells in fresh thymus co‐expressing the TiγA and δTCS1 epitopes. TcR1<jats:sup>dim</jats:sup> and TcR1<jats:sup>bright</jats:sup> clones can be distinguished. Biochemical and molecular studies on both types of clones generated from these thymocytes reveal a unique T cell receptor structure characterized by the use of a V<jats:sub>γ</jats:sub>9/C<jats:sub>γ</jats:sub>2‐encoded 55‐kDa γ chain nondisulfide linked to a V<jats:sub>δ</jats:sub>1‐encoded δ chain.</jats:p>