Sequence-specific and phosphorylation-dependent proline isomerization: a potential mitotic regulatory mechanism.
Yaffe MB, Schutkowski M, Shen M, Zhou XZ, Stukenberg PT, Rahfeld JU, Xu J, Kuang J, Kirschner MW, Fischer G, et al. Science. 1997 Dec 12; 278(5345):1957-60.