... xenobiotica, 2002, vol. ... Xenobiotica ISSN 0049±8254 print/ISSN 1366±5928 online # 2002 Taylor & Francis Ltd http://www.tandf.co.uk/journals DOI: 10.1080 ... protein, 1mm NADPH, 2.5 mm MgCl2, and substrate (BZ; concentrations from 2.5 to 1000 mm) in a ®nal volume of 0.4 ml ...