- Downregulation of FUSE-binding protein and c-myc by tRNA synthetase cofactor p38 is required for lung cell differentiation. Kim, M.J., Park, B.J., Kang, Y.S., Kim, H.J., Park, J.H., Kang, J.W., Lee, S.W., Han, J.M., Lee, H.W., Kim, S. Nat. Genet. (2003)