In the original article by Oldendorf et al, "Brain Uptake of Selenomethionine Se 75: I. Effects of Elevated Blood Levels of Methionine and Phenylalanine," which appeared in the May 1971 issue of the Archives (24:423-430), on page 243, column 2, nine lines from the bottom, the word "In" should be changed to "If." Also, on page 429, two changes should be made on Fig 4: melphalan should be changed to L-phenylalanine and methionine should be changed to L-methionine.