Cell Biology Correction for “Cross-talk between Chk1 and Chk2 in double-mutant thymocytes,” by Kathrin Zaugg, Yu-Wen Su, Patrick T. Reilly, Yasmin Moolani, Carol C. Cheung, Razquallah Hakem, Atsushi Hirao, Quinghua Liu, Stephen J. Elledge, and Tak W. Mak, which was first published March 6, 2007; 10.1073/pnas.0611584104 (Proc. Natl. Acad. Sci. U.S.A. 104, 3805–3810).
The authors note an error related to the last two flow cytometry sub-panels of Fig. 6B showing p-Brca1 (Ser1423) expressions in DN2 and DN3 thymocytes of Lck-Chk1+/+, Lck-Chk1fl/+, and Lck-Chk1fl/fl mice. The same flow cytometry sub-panel of p-Brca1 for DN2 thymocytes was erroneously taken also for DN3 thymocytes.
The error occurred at the time of the assembly of all the flow cytometry sub-panels of Fig. 6 and was detected 16 y after its initial publication. In accordance with institutional policies on data storage, a copy of the correct flow cytometry sub-panel is no longer available.
The error does not alter the overall results or conclusions of the published article. Since increased p-Brca1 (Ser1423) could be detected in Chk1-deficient T cells as stated in the text, there is no impact of this error on an informed reader.