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Science 21 February 1992:
Vol. 255. no. 5047, p. 904
DOI: 10.1126/science.255.5047.904-e
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Articles

Erratum

In the Research News article "Is nitric oxide the `retrograde messenger'?" by Marcia Barinaga (29 Nov., p. 1296), in the illustration on page 1297, the word "citroline" should have read "citrulline".

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Science. ISSN 0036-8075 (print), 1095-9203 (online)