Corrections and Clarifications


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Science  28 Aug 1987:
Vol. 237, Issue 4818, pp. 964
DOI: 10.1126/science.237.4818.964-b


In the article "Splicing of messenger RNA precursors" by Phillip A. Sharp (13 Feb. p. 766), the results of C. Weissmann (53) were incorrectly described. As H. Hornig et al. show [Natur (London) 324, 589 (1987)], a C at the branch site of a precursor RNA does not arrest splicing at the intermediate stage, while either a U or a G at this position does arrest splicing at this point.