Correction: Recombinational Bypass of Pyrimdine Dimers Promoted by the recA Protein ofEscherichia coliSource: Proceedings of the National Academy of Sciences of the United States of America,Vol. 79, No. 16, [Part 1: Biological Sciences] (Aug. 15, 1982), p. 5101Published by: National Academy of SciencesStable URL: http://www.jstor.org/stable/12677 .

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Corrections Proc. Natl. Acad. Sci. USA 79 (1982) 5101

Correction. In the article "Recombinational bypass of pyrimi- dine dimers promoted by the recA protein of Escherichia coli" by Zvi Livneh and I. R. Lehman, which appeared in number

10, May 1982 of Proc. Natl. Acad. Sci. USA (79, 3171-3175), the reproduction of Fig. 2 did not do justice to the original pho- tograph. A version at less contrast is shown here.

-RFII -RF11 - RFIII _RF11

-RFI RF1

-ss DNA -ss DNA

M 0 10 25 50 90 120 0 10 25 50 90 120 M M 0 10 25 50 90 120 0 10 25 50 90 120 M

No dimers 7 dimers/molecule 21 dimers/molecule 70 dimers/molecules

FIG. 2. Analysis by agarose gel electrophoresis of strand exchange between UV-irradiated phage 4X174 ss DNA preparations with 0, 7, 21, and 70 dimers per molecule and 4X174 linear duplex DNA. The reaction was carried out without an ATP-regenerating system. Lanes: M, DNA markers; 0-120, minutes of incubation.

Correction. In the article "Linkage disequilibrium due to ran- dom genetic drift in finite subdivided populations" by Tomoko Ohta, which appeared in number 6, March 1982 of Proc. Natl. Acad. Sci. USA (79, 1940-1944), the author requests that the following be noted. The 16th line of the Abstract should read "natural selection and limited migration, showing the latter as the main cause of the observed linkage disequilibrium."

Correction. The article "Molecular dynamics of an a-helical polypeptide: Temperature dependence and deviation from har- monic behavior" by Ronald M. Levy, David Perahia, and Mar- tin Karplus, which appeared in number 4, February 1982 of Proc. NatL Acad. Sci. USA (79, 1346-1350), should have ap- peared under the classification Biophysics.

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