Biochemistry. In the article “Mechanism of protein remodeling by ClpA chaperone,” by Marie Pak and Sue Wickner, which appeared in number 10, May 13, 1997, of Proc. Natl. Acad. Sci. USA (94, 4901–4906), the authors wish to correct a printer’s error. On page 4903, in Table 1, line 4 with “RepA + ClpA + ATP,” 46% of the RepA was retained in the condition of the first column with “No NaCl” and at “0°C” instead of 10% as stated.