Nottrott, S., Hartmuth, K., Fabrizio, P., Urlaub, H., Vidovic, I., Ficner, R., et al. (1999). Functional interaction of a novel 15.5kD [U4/U6.U5]tri-snRNP protein with the 5′-stem-loop of U4 snRNA. EMBO Journal, 18, 6119-6133.