This volume contains eight chapters that present both new and reviewed information fundamental to a clear understanding of lipid catabolism and transport at the molecular level. Three-dimensional structures of important serum lipoproteins, apolipoproteins, and lipases, utilizing X-ray data when available, are emphasized, and an attempt is made to relate structures to function. - Amphipathic helix - Apolipoprotein E - Lipophorin - Structure of serum albumin - Lipid binding proteins - Apolipoprotein B - Low-density lipoprotein