Arthritis and Diet

Lecture by Kevin Ahern of Oregon State University discussing Biochemistry Basics in BB 450. See the full course at oregonstate.edu This course can be taken for credit (wherever you live) via OSU’s ecampus. For details, see ecampus.oregonstate.edu Download Metabolic Melodies at www.davincipress.com Related courses include BB 350 – oregonstate.edu BB 451 – oregonstate.edu BB 100 – oregonstate.edu Carbohydrates Lecture II Highlights 1. A given stereoisomeric structure of a sugar may exist in different configurations, depending on steric considerations. These are referred to as boat and chair. 2. Linking together of more than one sugar residues creates higher order saccharides. These include disaccharides (two sugars), trisaccharides (three sugars), oligosaccharides (several sugars), and polysaccharides (many sugars). 3. Most of the linkages in higher order saccharides involve glycosidic bonds. 4. Disaccharides include sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (two glucoses). Linkages of these are shown in the figures in the notes. 5. Sucrose is a non-reducing sugar (has no free anomeric hydroxyl), whereas lactose is a reducing sugar (has a single free anomeric hydroxyl). The sucrose figure in your book shows a confusing structure. You are responsible for the structure of sucrose and the linkages for the disaccharides I described in class. 6. Oligosaccharides are components of glycoproteins. 7. The most common polysaccharides include glycogen …