Nucleic Acids Res. 2003;31:7238–7246, doi:10.1093/nar/gkg889.
The authors wish to apologize for the following errors in their article.
On page 7242, left column, lines 19–20, the sentence ‘DNA-PKCS:DNA ratios ranged from 3:1 to 1:10’ should be ‘DNA:DNA-PKCS ratios ranged from 1:10 to 3:1’.
On page 7242, right column, line 16, the sentence ‘Ligation of DNA ends was studied in vitro, using a 965 bp radiolabeled DNA substrate with 5′ protruding ends, under the same reaction conditions that were used to demonstrate DNA-PK autophosphorylation’ should be ‘Ligation of DNA ends was studied in vitro, using a 965 bp radiolabeled DNA substrate with 3′ protruding ends, under the same reaction conditions that were used to demonstrate DNA-PK autophosphorylation’.
These corrections do not influence the validity of the results and conclusions.