DEVELOPMENTAL BIOLOGY. For the article “The mouse homeobox gene Noto regulates node morphogenesis, notochordal ciliogenesis, and left–right patterning,” by Anja Beckers, Leonie Alten, Christoph Viebahn, Philipp Andre, and Achim Gossler, which appeared in issue 40, October 2, 2007, of Proc Natl Acad Sci USA (104:15765–15770; first published September 20, 2007; 10.1073/pnas.0704344104), the authors note that, due to a printer's error, an incorrect definition was given for the abbreviation PNC in the first paragraph of the Introduction and in the Abbreviations footnote. The correct definition is “posterior notochord.” The online version has been corrected. The corrected Abbreviations footnote appears below.
Abbreviations
- E(n)
embryonic day n
- PNC
posterior notochord.