Licolor is the whiJ gene (SCO4543) for a deduced DNA-binding protein (Gehring et al., 2000; Ainsa et al., 2010). Most of the 24 paralogues of whiJ in the S. coelicolor chromosome are associated with one or both of two kinds of immediately neighbouring genes, one kind encoding very small DNA-binding proteins (i.e. like SCO4542) and the other encoding proteins with features like antisigma factors (e