Transcript levels of selected genes in apical/basal cells as shown by real-time RT-PCR.
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(A, B): The expressed sequence tags (ESTs) showed specific distribution in apical cell. (C–O): ESTs showed a significantly higher level in apical vs. basal cells (≥2-fold difference). (P–S): ESTs showed a significantly higher level in basal vs. apical cells (≥2-fold difference). Ap, apical cell; Ba, basal cell; Zy, zygote. Expression level in apical cell was set to 1.