Abstract
In the report by C. A. Chidsey, G. A. Kaiser, and E. Braunwald, "Biosynthesis of norepinephrine in isolated canine heart" [Science 139, 828 (1 March 1963)], line 16 in the next-to-last paragraph (column 2, page 829) should have read: "It therefore appears likely that the whole rat has biosynthetic pathways for the formation of norepinephrine which are not present in the canine heart." In the published version the word likely read unlikely.
