Correction: Myocyte-Specific Enhancer Factor 2 Acts Cooperatively with a Muscle ActivatorRegion to Regulate Drosophila Tropomyosin Gene Muscle ExpressionSource: Proceedings of the National Academy of Sciences of the United States of America,Vol. 93, No. 15 (Jul. 23, 1996), pp. 8152-8153Published by: National Academy of SciencesStable URL: http://www.jstor.org/stable/40180 .

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8152 Corrections Proc. Natl. Acad. Sci. USA (1996)

Biochemistry. In the article "Myocyte-specific enhancer factor 2 acts cooperatively with a muscle activator region to regulate Drosophila tropomyocin gene muscle expression" by Meei-Hua Lin, Hanh T. Nguyen, Claire Dybala, and Robert V. Storti,

which appeared in number 10, May 14, 1996 of Proc. Natl. Acad. Sci. USA 93, 4623-4628, the quality of the reproduction of Figs. 3-5 was unsatisfactory. The figures and their legends are shown below.

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FIG. 3. Whole mount in situ hybridization analysis of embryonic body wall expression of MEF2 trans- gene constructs. The probe for de- tecting transgene expression was an antisense 13-galactosidase riboprobe. (A) 1B transgene; (B) MA trans- gene; (C) 1BAMEF2 transgene; (D) MEF2 oligonucleotide transgene; (E) 3BAMEF2 transgene; (F) MA+MEF2 transgene. All embryos are approximately stage 16 and are positioned with anterior to the left and dorsal up.

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FIG. 4. Larval body wall and visceral muscle expression of MEF2 transgene constructs. (A, C, E, G, and I) Three-hour ,B-galactosidase-stained larval body wall muscles. (B, D, F, H, and J) Three-hour ,3-galactosidase-stained larval visceral muscles. (A and B) 1B transgene; (C and D) MA transgene; (E and F) 1BAMEF2 transgene; (G and H) MEF2 oligonucleo- tide transgene; (I and J) MA+MEF2 transgene. L, lateral muscles; D, dorsal muscles; DM, dorsal midline; H, circular muscles of the hindgut; M, longitudinal muscles of the midgut; MT, unstained malpighian tubules.

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Corrections Proc. Natl. Acad. Sci. USA (1996) 8153

FIG. 5. Whole mount in situ hybridization analysis of TmI expression in mef2 mutant embryos. Antisense TmI was used as a riboprobe. (A) Endogenous TmI expression in stage 16 wild-type embryo. (B) Stage 16 Df(2R)XJ/Df(2R)P520 transheterozygous embryo, showing reduced TmI expression in body wall muscles; arrow shows TmI expression in a residual fused muscle fiber. (C) Stage 16 Df(2R)XJ/lDf(2R)P520 transheterozygous embryo, showing visceral muscle staining. (D) Stage 16 Df(2R)XJ/Df(2R)P520 transheterozygous embryo, showing dorsal vessel (arrow) staining. All embryos are orientated with anterior to the left. InA and B embryos are lateral views, in C and D they are ventral and dorsal views, respectively.

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