Polysaccharides: Difference between revisions
From Proteopedia
Jump to navigationJump to search
No edit summary |
No edit summary |
||
| Line 6: | Line 6: | ||
=== Branched chain, α(1→4) glycosidic bonds === | === Branched chain, α(1→4) glycosidic bonds === | ||
<scene name='Polysaccharides/ | <scene name='Polysaccharides/9_5_amylopectin1/1'>Amylopectin</scene> is also a large glucose polymer that has α(1→4) glycosidic bonds connecting the glucose units, but it also contains α(1→ 6) glycosidic bonds. In this scene the main branch is colored yellow, the side branch is green and the oxygen atoms of the α(1→4) bonds are red. Rotate <scene name='Polysaccharides/9_5_amylopectin1a/1'>Amylopectin</scene> to view the glucopyranosyl units on edge and verify that the bonds are α linkages. <scene name='Polysaccharides/9_5_amylopectin2/1'>Glucose unit four</scene>, branching point, colored yellow. The green ring is the reducing end of the molecule. The chain that proceeds from the branching point is colored blue. The yellow rings are the non-reducing ends of the two branches. They just happen to be close to each other in this model. The structure is more open (helix is not wound as tight) than the amylose because more space is needed for the chain that is formed at the branching point. The native amylopectin having many more branching points would be more open than this structure, in fact it would have very little curvature. Rotating & zooming amylopectin gives a focused view of the α(1→ 6) bond. <scene name='Polysaccharides/20_5_10/1'>TextToBeDisplayed</scene> | ||
</StructureSection> | </StructureSection> | ||
