Transformer-2 protein homolog beta, also known as TRA2B previously known as splicing factor, arginine/serine-rich 10 (transformer 2 homolog, Drosophila) (SFRS10), is a protein that in humans is encoded by the TRA2B gene. [5] [6]
TRA2B contains a poison exon whose inclusion is autoregulated by TRA2B protein. Proper regulation of poison exon inclusion in TRA2B is important for T cell fate. [7]