Fig. 1. Schematic of the structure of the gene Opaque 2 based on descriptions by Maddaloni et al. (1989) and Schmidt et al. (1990). Numbers in italics represent relative positions as base pairs along the DNA molecule. Due to space constraints, labels for some exons and introns are abbreviated (e.g., "I 2") or not shown (e.g., Intron 3).

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