Correction

NEUROSCIENCE. For the article “Nitrosative stress linked to sporadic Parkinson's disease: S-nitrosylation of parkin regulates its E3 ubiquitin ligase activity,” by Dongdong Yao, Zezong Gu, Tomohiro Nakamura, Zhong-Qing Shi, Yuliang Ma, Benjamin Gaston, Lisa A. Palmer, Edward M. Rockenstein, Zhuohua Zhang, Eliezer Masliah, Takashi Uehara, and Stuart A. Lipton, which appeared in issue 29, July 20, 2004, of Proc. Natl. Acad. Sci. USA (101, 10810–10814; first published July 13, 2004; 10.1073/ pnas.0404161101), the authors note that “MS” was misplaced in the Fig. 4 legend due to a printer's error. The first two lines should read “Peptide mass fingerprinting analysis of the modified thiol group of cysteine residues within the highly conserved RING I domain of recombinant human parkin exposed to SNOC. (Upper) Quadrupole time-of-flight (Q-TOF) MS results for RING I domain of recombinant parkin exposed to SNOC.”