(A) The top ten promoter enriched transcription factors (TF) identified by DiRE include known muscle regulators RP58, NF1, ZIC3 and the MEIS1/HOXA9 complex. Occurrence indicates the percentage of gene regulatory regions that contain a binding site for the specified TF. Significant TF are ranked according to importance (calculated as the product of TF occurrence and TF weight, as assigned by DiRE (Gotea and Ovcharenko, 2008)). In situ images from Genepaint.org (Set ID in brackets) of E14.5 intestinal cross sections for (B) RP58 (ZFP238) [MH813], (C) TAL1 [EH2794], (D) E47 (TCF3) [MH770], (E) NF1 [ES1724], (F) LDP1 (UBP1) [EN293], (G) ZID (ZBTB6) [MH3098], (H) ZIC3 [EB2075], (I) PAX4 [MH3124], (J) ROAZ (ZFP423) [MH1157], (K) JUN [MH524], (L) MEIS1 [EG1701], and (M) HOXA9 [EB2525].