A far-upstream (-70 kb) enhancer mediates Sox9 auto-regulation in...

We identify here an evolutionarily conserved enhancer located 70-kb upstream of mouse Sox9 and call it SOM because it specifically activates a Sox9 promoter reporter in most Sox9 -expressing somatic tissues in transgenic mice.

http://nar.oxfordjournals.org/content/41/8/4459.short?rss=1