- Transducer of regulated CREB-binding proteins (TORCs) induce PGC-1{alpha} transcription and mitochondrial biogenesis in muscle cells. Wu, Z., Huang, X., Feng, Y., Handschin, C., Feng, Y., Gullicksen, P.S., Bare, O., Labow, M., Spiegelman, B., Stevenson, S.C. Proc. Natl. Acad. Sci. U.S.A. (2006)