Due to a printer error, the online version of the article by Paul E. Polak, Federico Simone, Joseph J. Kaberlein, Roger T. Luo, and Michael J. Thirman, “ELL and EAF1 are Cajal Body Components That Are Disrupted in MLL-ELL Leukemia” (Mol. Biol. Cell 2003 14, 1517–1528; 10.1091/mbc.E02-07-0394) was corrected in departure from the print. The second-to-last sentence in the abstract for this article is now published correctly as “Nuclear and cytoplasmic fractionation revealed diminished expression of p80 coilin and EAF1 in the nuclei of MLL-ELL leukemia cells.”