Correction

BIOCHEMISTRY. For the article “Mapping the intrinsic curvature and flexibility along the DNA chain” by Giampaolo Zuccheri, Anita Scipioni, Valeria Cavaliere, Giuseppe Gargiulo, Pasquale De Santis, and Bruno Samorì, which appeared in number 6, March 13, 2001, of Proc. Natl. Acad. Sci. USA (98, 3074–3079; First Published February 27, 2001; 10.1073/pnas.051631198), the authors note the following correction. In the last part of the Discussion, the following DNA base steps were termed incorrectly: AT·TA should be AT·AT; TA·AT should be TA·TA; CG·GC should be CG·CG; and GC·CG should be GC·GC. The other sections and the figure legends are not affected.