TF binding sites (cont.)
	only 19% of noncoding sequence has >50% probability of being aligned, but this 19% contains 74/75 of the muscle-specific sites and 75% of the Sp1 binding sites if the Gibbs sampler looks for motifs in the 19% of conserved sequence, the three principal motifs are found easily conclusion: comparative genomics may be a fruitful approach to detection of regulatory sites in DNA