A schematic diagram of putative regulatory motifs in the promoter of CcSox5, CcSox6 and CcSox13. The scale is given above and the full names of the potential TF binding sites are provided at the bottom. Transcriptional initiate site (ATG) is designated as +1. BSX, Brain specific homeobox; BRN4, POU domain transcription factor brain 4; NGN–NEUROD, Neurogenin and NeuroD; Oct4, POU domain, class 5, transcription factor 1; Nanog, Homeobox transcription factor Nanog; FOXP1, Alternative splicing variant of FOXP1, activated in ESCs; AP1, Activator protein 1; CEBPB, CCAAT/enhancer binding protein beta; NF-Y, Nuclear factor Y; SF1, Steroidogenic Factor-1.