Biotransformation of lipids 9.1 Introduction 9.2 The structure, roles and abundance of sterols and steroids 9.3 Selective degradation of the sterol side chain 298 9.4 Specific steroid interconversions and reactions 9.5 Transformation of other terpenoids 321 9.6 Chemical conversion of miscellaneous organic compounds 9.7 Production and use of fatty acids and their derivatives 9.8 Selection of production systems for the biotransformation of lipids 337 339293 Biotransformation of lipids 9.1 Introduction 9.2 The structure, roles and abundance of sterols and steroids 9.3 Selective degradation of the sterol side chain 9.4 Specific steroid interconversions and reactions 9.5 Transformation of other terpenoids 9.6 Chemical conversion of miscellaneous organic compounds 9.7 Production and use of fatty acids and their derivatives 9.8 Selection of production systems for the biotransformation of lipids Summary and objectives 294 295 298 309 321 326 329 337 339