Applied Biological Sciences. In the article “Regulation of the zinc transporter ZnT-1 by dietary zinc” by Robert J. McMahon and Robert J. Cousins, which appeared in number 9, April 28, 1998, of Proc. Natl. Acad. Sci. USA (95, 4841–4846), the authors request that the following correction be noted. In Materials and Methods, there was a typographical error in the ZnT-1 peptide used for antibody production. The correct peptide sequence should be GTRPQVHSGKE.