Abstract
AbstractA second isoform of pTα, “pTαb,” is derived from the pTα locus by tissue-specific, alternative splicing. pTαb is coexpressed in the thymus with the previously characterized form of pTα (which we term pTαa) and is also expressed in peripheral cells without pTαa. While pTαa acts to retain most TCR β-chains intracellularly, pTαb permits higher levels of cell surface TCRβ expression and facilitates signaling from a CD3-TCRβ complex.
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