Description: Segment 1 Opening credits. Dr Schrager summarises Part 1 of the lecture and says that in Part 2 he will report a comparative study of glycoproteins isolated from stomachs containing a carcinoma. He describes the study, which used gel chromatography to elute normal mucosa and the carcinoma. A graph shows the results of the chromatography, and a chemical chart showing the glycoproteins is also seen. Time start: 00:00:00:00 Time end: 00:05:23:00 Length: 00:05:23:00 Segment 2 Next, Schrager discusses glycoproteins coming from the carcinoma. A table shows information on malignant glycoproteins, and Schrager describes their properties and structure. He also talks about their amino acid compositions. Time start: 00:05:23:00 Time end: 00:09:44:05 Length: 00:04:21:05 Segment 3 Schrager compares the composition of normal and malignant glycoproteins, saying that there is a fundamental similarity. A table lists their carbohydrate abundances. He discusses the enzymes present in the two glycoproteins. Time start: 00:09:44:05 Time end: 00:15:44:00 Length: 00:05:59:20 Segment 4 Schrager discusses the stability of the malignant glycoproteins. He goes on to talk about how the results of this study provide a new approach to the classification of carcinomata of the gastrointestinal tract. Tables list figures relating to malignant glycoproteins. Schrager discusses how to classify them according to secretion, sialic acid content and sulfation. Time start: 00:15:44:00 Time end: 00:20:23:18 Length: 00:04:39:18