Monosaccharides
- D-glyceraldehyde molecular structure
- L-glyceraldehyde molecular structure.
- Mirror images of each other.
- D-glucose
- carbon C1 and C5 approach
- Pyranose ring.
- α-D-glucopyranose.
- β-D-fructofuranose.
- D-glucosamine
Disaccharides
- 2 glucose molecules approach.
- 1 water molecule is lost
- a glycosidic bond is formed.
- Maltose shows a α-glycosidic bond
- Cellobiose shows a β-glycosidic bond, like sucrose.
Polysaccharides
- Maltose (2 residues of glucose)
- We add a 3rd, 4th, 5th and 6th residues.
- Activate rotation to observe helical structure
- Zoom out and addition of more glucose residues to reach a 30 residues molecule
- Look from a polar view.
- A fragment of amylopectin including 5 glucose residues.
- Zoom in to show a Branch point
- 4 residues at branch point.
- By adding to initial structure 25 glucose residues we get a 30 residues amylopectin fragment.
- Zoom out to show that branch points are spaced by 24-30 glucose residues.
- Glycogen.- Structure like amylopectin but with branch points spaced by 8-12 glucose residues.
- See cellulose.
- A 3 residues chitin fragment.
Files for 3D printer
Alpha-amylase with flexible amylopectin by Marius Mihasan
