Tau protein identifies introns using guide RNA, whereas transcription factor activity identifies TATA-BOX in promoters and Homeobox, MADS-box, and HMG box in enhancers. This is a double-insurance positioning method for tau protein. The double insurance positioning method of tau protein says that it can't be in the Poly C region or the stop codon and move the telomere fragment, even though "TAA" is in both places (possibly as a stop codon).