Fig. 6. Alignment of module A of the Endo16 promoter from S. purpuratus and L. variegatus. Sequences extend upstream 335 bp and 345 bp relative to the transcriptional start site for L. vareigatus and S. purpuratus, respectively. (Asterisks indicate a nucleotide match.) Transcription factor binding sites identified in module A of the SpEndo16 promoter are outlined by a red box. The Otx and Z binding sites occur only once within the SpEndo16 promoter, although there are multiple binding sites for the proteins CG, CP and GCF1.