20 15 Oct 2010

20 15 Oct 2010 - Four types of polysaccharides (glycans)...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Four types of polysaccharides (glycans) Homopolysaccharides only one type of monosaccharide Heteropolysaccharides two or more types Linear or Branched Most homopolysaccharides are glucose polymers necessary for food storage with rapid access Polymers are necessary to reduce the osmolarity in the cell Starch in plants have (14) linkages in linear polymers of amylose and branched polymers of (14) and (16) linkages of amylopectin with branching every ~25 residues Glycogen is amylopectin except branching ~10 residues apart #1 Cellulose are linear homopolysaccharides of glucose with (14) linkages up to ~15K residues Glucose for fuel has (14) so normal glycosidic enzymes cannot act on (14) Cellulase, (14) glycohydrolase, is an enzyme found in wood fungi and some microorganisms #2 Chitin, the exoskeleton of invertebrates, is a homopolysaccharide of modified glucose with (14) linkages The 2 OH is replaced with an amine = glucosamine The amine is protected by acetylation Like protein backbone rotation, the and angles of glycosidic bonds adopt orientations that minimize potential energy Potential energy minima for two bonds do not dictate the final...
View Full Document

Page1 / 16

20 15 Oct 2010 - Four types of polysaccharides (glycans)...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online