Class Notes (839,080)
Canada (511,183)
Biochemistry (232)
BIOCHEM 2EE3 (157)
Lecture

8 Lipids.pdf

3 Pages
109 Views

Department
Biochemistry
Course Code
BIOCHEM 2EE3
Professor
Boris Zhorov

This preview shows page 1. Sign up to view the full 3 pages of the document.
Description
8 Lipids and Biomembranes! Lipid: biomolecule that is soluble in organic solvents. Classes of lipids include fats, oils, nonprotein membrane components and certain vitamins and hormones. •Unlike proteins, nucleic acids and carbohydrates, lipids are NOT polymers. •They do, however, have great structural variety. Functions of lipids: •Components of biological membranes •energy reserve •signaling molecules Classifications of lipids, based on their chemical structure: •Fatty acids •Triacylglycerols •Glycerophospholipids •Sphingolipids, •Steroids Fatty acids: Carboxylic acids with long-chain hydrocarbon groups. •Stearic acid: HO-C(O)-(CH2)16-CH3 --> 18 Carbons, saturated •Oleic acid: 18 carbons, unsaturated 9-10 bond. •Linoleic acid: 2 unsaturated double bonds. •Unsaturated fatty acids pack together less tightly than saturated ones. Triacylglycerols: Most abundant class of lipids - not components of biomembranes. •Synthesized and stored in adipocytes - fat cells, the long term energy deposit of animals •Fat content of normal humans (21% men 26% female) allow up to 3 months of starvation survival. Glycerophospholipids: family of a amphiphilic (both hydrophobic and hydrophilic components) with aliphatic tails and polar heads •They are the major lipid component of biological membranes. •One glycerophospholipid, dipalmitoylphosphatidylcholine (DPPC) is the major lipid component of the lung surfactant, a substance that is essential for normal pulmonary function by breaking the surface tension of water around the alveolar sacs •This prevents lung collapse. Spingolipids: Derivatives of sphingosine and a fatty acid residue and saccharide. 8 Lipids and Biomembranes! Cerebrosides: exist in the brain, where
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit