TCF12/HEB (E5R8X) Rabbit mAb #78245

TCF12/HEB (T cell factor 12/HeLa E-box binding protein) is a member of the E proteins that are type I basic helix-loop-helix domain-containing transcription factors that bind directly to the E-box DNA consensus sequence and control numerous developmental processes (1,2). E protein family members include E2A, E2-2, and TCF12/HEB. TCF12/HEB forms homo- or heterodimers with other E proteins to regulate transcription of target genes that play a critical role in the development of T cells, B cells, and plasmacytoid dendritic cells (2-4). The TCF12/HEB gene has two transcriptional start sites leading to the generation of the long form called HEBCan, and the short form, HEBAlt (5). The two isoforms are thought to have distinct functions, with HEBCan playing a role throughout T cell development, while HEBAlt functions in the efficient generation of T cell precursors (5).