Kachroo, Aashiq Hussain Evolution of new metabolic functions by mutations in pre-exiting genes the chb operon of excherichia coll as a paradigm by Aashiq Hussain Kachroo - Bangalore Indian Institute of Science 2007 - iii, 72p. - IISc., Dept of MRDG, PhD Thesis . CD included Dewey Class. No.: 576.549015724 / P07 "THESIS"