Correction

APPLIED PHYSICAL SCIENCES, PLANT BIOLOGY. For the article “Functional analysis of each blue light receptor, cry1, cry2, phot1, and phot2, by using combinatorial multiple mutants in Arabidopsis,” by Maki Ohgishi, Kensuke Saji, Kiyotaka Okada, and Tatsuya Sakai, which appeared in issue 8, February 24, 2004, of Proc. Natl. Acad. Sci. USA (101, 2223–2228; first published February 17, 2004; 10.1073/pnas.0305984101), the authors note that the article should be classified as “Plant Biology” instead of “Applied Physical Sciences.”