Description: Segment 1 Opening credits. Footage of unhealthy activities (e.g. walking alongside heavy traffic, smoking and fatty foods) is seen, as well as images of related medical activities (e.g. taking blood pressure, measuring body fat etc.). Dr Galton introduces the topic, beginning with the role of lipoproteins in fuel metabolism and using diagrams as aids. He explains carbohydrates and lipids, how the body absorbs them and their advantages and disadvantages. He also talks about transfer of fatty acids and the sizes of lipoprotein particles, shown in a chart. Time start: 00:00:00:00 Time end: 00:05:10:17 Length: 00:05:10:17 Segment 2 Dr Galton hands over to Dr Chait, who discusses the structure and composition of lipoprotein particles. He displays 2 3-dimensional models of lipoprotein molecules with illustrated centres showing their composition. He then briefly explains apoproteins. Time start: 00:05:10:17 Time end: 00:09:47:00 Length: 00:04:36:08 Segment 3 Dr Chait then considers the individual lipoprotein classes, of which there are four. He first discusses chylomicrons, explaining where they are found and their composition. Diagrams of molecular structures are also seen. He then talks about pre-beta-lipoproteins, a-lipoproteins and beta-lipoproteins. He goes on to explain how lipoproteins are separated by electrophoresis and ultracentrifugation. Footage of these processes is seen as Dr Galton explains how they are done. Time start: 00:09:47:00 Time end: 00:15:11:06 Length: 00:05:24:06 Segment 4 Dr Galton continues to explain ultracentrifugation as footage of the process is seen. He then examines each lipoprotein particle in turn to see how they function as a fat transporting system within the body. A diagram of an organ framework is seen. He begins with detailing chylomicron particles. He passes back to Dr Chait, who addresses pre-beta-lipoprotein particles. Time start: 00:15:11:06 Time end: 00:20:15:08 Length: 00:05:04:02 Segment 6 Chait continues to explain beta and alpha-lipoproteins. Galton then summarises the lipoprotein system, seen in a diagram. Time start: 00:24:59:03 Time end: 00:27:35:12 Length: 00:02:36:09