Conserved promoter elements in light-induced genes. Conserved CRE and TATA-box elements in promoter regions of four immediate-early genes in five mammalian genomes: (A) Egr1, (B) Fos, (C) Per1 and (D) Klf4. Translational start codon ATG begins at +1. Alignment gaps are shown as dashes (-), dots (.) indicate identity to the first sequence. For Klf4, genomic sequence of dog was not available. Predicted conserved CRE elements are outlined with shaded boxes; putative TATA-boxes are shown with white boxes.