Cytokine-induced paracrystals prolong the activity of signal transducers and activators of transcription (STAT) and provide a model for the regulation of protein solubility by small ubiquitin-like modifier (SUMO).

VOLUME 286 (2011) PAGES 18731–18746

Fig. 2C and supplemental Figs. S2A and S4C contained duplicated images. These errors have now been corrected and do not affect the results or conclusions of the work.