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Fig. 1. The structure of the Tribolium br gene inferred from the genome
and the isolated mRNA of br isoforms identified in the present
study. Five zinc-finger domains (br-Z1 through br-Z5)
were found in close proximity to the br core region. mRNA of the
br isoforms consisted of each of these isoform-specific domains
alternatively spliced to the core region. An additional isoform was found that
consisted of the br core region spliced to the br-Z1 and
br-Z4 zinc-finger domains with an intron between them.