to define essential structural features of effectors for one positively acting gene regulator , the xyls-encoded protein , which activates the tol plasmid meta-cleavage pathway operon promoters , effector activities of a wide range of benzoate derivatives have been systematically analyzed , and mutant xyls-encoded proteins exhibiting altered effector specificities have been generated and characterized .
C0033684
protein
C1564139
mutant