Cover photograph (Copyright © 1999, American Society for Microbiology. All rights reserved.): The ecdysone receptor controls Drosophila metamorphosis by activating complex cascades of gene transcription. The ecdysone receptor and the GATAb transcription factor bind to adjacent sites in the enhancer of the stage- and tissue-specific Fbp1 gene. This figure shows the distribution of the GATAb factor in lymph glands (upper right) and pericardial cells (lower left) dissected from a late third-instar larva and stained with GATAb antibody. (See related article on page 5732.)
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