There is a little symbol at the bottom of my main screen that seems to come and go for no reason... it looks like a little cell phone with a curved arrow pointing to it. It is centered above the MENU option on the main screen.
Transcription factors are proteins that bind to specific DNA sequences in order to regulate the expression of a given gene. The power of transcription factors resides in their ability to activate and/or repress wide repertoires of downstream target genes.
It is defined as a set of adjacent structural genes, plus the adjacent regulatory signals that affect transcription of the structural genes.5 The regulators of a given operon, including repressors, corepressors, and activators, are not necessarily coded for by that operon.