Gray and cyan ribbons, Mtb RNAP; yellow and orange ribbons, transcription initiation factor sigma; red and pink ribbons, DNA (specific sequence elements in blue). (sciencedaily.com)
In many imprinted genes, regulatory sequence elements have been identified that are methylated on one of the parental chromosomes only. (geneimprint.com)
Identification of a novel sequence element in the common promoter region of human collagen type IV genes, involved in the regulation of divergent transcription (biochemj.org)