- A very large protein with diverse functional motifs is deficient in rjs (runty, jerky, sterile) mice. Lehman, A.L., Nakatsu, Y., Ching, A., Bronson, R.T., Oakey, R.J., Keiper-Hrynko, N., Finger, J.N., Durham-Pierre, D., Horton, D.B., Newton, J.M., Lyon, M.F., Brilliant, M.H. Proc. Natl. Acad. Sci. U.S.A. (1998)