Figure 1From: Motif composition, conservation and condition-specificity of single and alternative transcription start sites in the Drosophila genomeSources of EST data. We took 631,239 EST alignments for 318,483 ESTs from the BDGC for release 4.3 of the fly genome annotation. The ESTs, derived from 16 main libraries, were filtered to a unique set of 157,093 alignments.Back to article page