Class Notes (838,343)
Canada (510,861)
Biochemistry (187)
BIOCH200 (135)
Lecture

BIOCH 200 (March 12, 2014) - Biological Membranes

4 Pages
97 Views
Unlock Document

Department
Biochemistry
Course
BIOCH200
Professor
Walter Dixon
Semester
Winter

Description
BIOCH 200 – Biological Membranes (March 12, 2014) • Lipids are hydrophobic in nature. Types of lipids: o Fatty acids o Triacylglycerides (TAGs/FAT) o Membrane lipids  Glycerophosholipids  Sphingolipids  Cholesterol • *Not found in plants or bacteria. They have their own analogous forms of this steroid o Cholesterol • Fatty Acids o *Up to 24 carbons long o *Amphipathic (aka amphiphillic)  Having polar and non-polar properties o *May be saturated or unsaturated  *Saturated – no bonds can be broken to allow for the incorporation of new atoms (only single bonds present)  *Unsaturated – bonds can be broken to allow for incorporation of other atoms (double bonds present) • Nomenclature: o Mono- (one double bond) or poly-unsaturated (more than 1 double bond) o *Double bonds are usually ‘cis’ (Z). This means that the more important substituent attached to either carbon are on the same side of the double bond • *Shorthand hydrocarbon chain naming: o Ex. 16:1Δ7  16 = number of carbons on the hydrocarbon chain  1 = # of double bonds present  7 = which carbon the double bond starts on • More than one? Separate with commas  16:3 Δ7,#,# o This does not indicate whether the double bonds are ‘cis’ or ‘trans’ though so this has to be indicated in a different way. • *‘Cis’ double bonds alter the shape of fatty acids and make the fatty acids harder to stack over each other. This allows for more fluidity. o *In saturated fatty acids, the tails are close together thus maximizing van der Walls interactions. More attraction to each other = more stability = less fluid in nature.  Oil has lots of ‘cis’ unsaturated fatty acids (liquid)  Butter has lots of saturated fatty acids (solid) • *Fatty acid melting points: o *The longer the length the higher the melting point o *The higher the saturation, the higher the melti
More Less

Related notes for BIOCH200

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