Bioconversion of deoxypodophyllotoxin into epipodophyllotoxin in E. coli using human cytochrome P450 3A4 - Kayser, O; Julsing, M K; Vasilev, N P; Schneidman-Duhovny, D; Koulman, A; Clarkson, C; Woerdenbag, H J; Ionkova, I; Wolfson, H J; Bos, R; Muntendam, R; Jaroszewski, J W; Quax, W J (Planta Med, 2008)