A TATA box is a DNA sequence that denotes the location where a genetic sequence can be read and decoded. It sends an indication to the other molecules where the transcription is being initiated. The DNA sequence of a TATA box is commonly TATAAA. TATA boxes are located 25-35 base pairs before the transcription start site of a gene in a eukaryotic transcription but are absent in prokaryotic transcription. In prokaryotic transcription, TATA boxes are functionally substituted by the Pribnow boxes.