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Sequence of exon 1 of Xbra2 (boldface type) together with 1.2 kb of 5′-flanking sequence. The first 82 bases of intron 1 are also included. Transcription initiation site is indicated by +1 and is also the first nucleotide in boldface type. ATTA sequences are double-underlined, and Antennapedia- and Bicoid-specific sites are marked Ant and Bcd, respectively. This sequence has been submitted to the EMBL database, accession number AJ001528.
