GC box
A SEQUENCE OF CONTIGUOUS GUANINE, GUANINE, GUANINE, CYTOSINE, AND GUANINE, IN THAT ORDER, ALONG A DNA STRAND
In molecular biology, a GC box, also known as a GSG box, is a distinct pattern of nucleotides found in the promoter region of some eukaryotic genes. The GC box is upstream of the TATA box, and approximately 110 bases upstream from the transcription initiation site.