Scientists discovered that this enhancer associated with hair color has a binding site for a particular transcription factor. one form of the binding site has the sequence cactaaag and is associated with dark hair, and the other form of the binding site has the nearly identical sequence cgctaag and is associated with blond hair. how could these two nearly identical enhancer binding sites lead to different rates of initiating transcription of the regulated gene?
Homeodomain a conserved sequence of 60 amino acids used in
the binding to DNA. Usually found in transcription factors, it is used to
express genes that are related, more specifically in development to the make
tissues associated with one another.
