EXPRESSION OF CONCERN: Mitogen-Activated Protein Kinase Phosphatase-1 (MKP-1): >100-Fold Nocturnal and Norepinephrine-Induced Changes in the Rat Pineal Gland.

Expression of Concern: D.M. Price, C.L. Chik, D. Terriff, J. Weller, A. Humphries, D.A. Carter, D.C. Klein, and A.K. Ho, "Mitogen-Activated Protein Kinase Phosphatase-1 (MKP-1): >100-Fold Nocturnal and Norepinephrine-Induced Changes in the Rat Pineal Gland," FEBS Letters 577, no. 1-2 (2004): 220-226, https://doi.org/10.1016/j.febslet.2004.09.083. This Expression of Concern is for the above article, published online on 18 October 2004 in Wiley Online Library (wileyonlinelibrary.com), and has been issued by agreement between the journal Editor-in-Chief, Michael Brunner; Federation of European Biochemical Societies (FEBS); and John Wiley & Sons Ltd. A third party alerted the journal to possible duplications of the GADPH loading control bands in Figures 1B, 2B, and 3B. The journal verified the duplications and the publisher attempted to contact the authors for original data and comments. The authors did not respond to the publisher's requests. In the absence of the original data, the journal and publisher are unable to fully investigate the identified duplications. Therefore, the journal has decided to issue an Expression of Concern to inform and alert readers.