Biochemistry 2280A Lecture Notes - Lecture 8: Trans Fat, Sphingosine, Carboxylic Acid

• School: Western University
• Department: Biochemistry
• Course: Biochemistry 2280A
• Professor: Derek Mc Lachlin

Document Summary

Biochemistry lecture 8 september 28, 2018. Topic 6 lipids and membranes: four main classes of biomolecule. Sugars (polysaccharides, glycogen, and starch (in plants)) Nucleotides (nucleic acids: types of lipids. A lipid is a biological molecular that has very little solubility in water: fatty acids energy and structure of membranes. Saturated (all single bonds) fairly flat. Monounsaturated (one double bond can be cis or trans) - kinky. A hydrocarbon chain with a carboxyl group at the end. Typically, they have an even number of carbon atoms and they range in length. Nor(cid:373)ally, tra(cid:374)s fatty a(cid:272)ids are(cid:374)"t as (cid:272)o(cid:373)(cid:373)o(cid:374) as (cid:272)is fatty a(cid:272)ids. First double bond is typically between the 9th and 10th carbon (start counting at the opposite end from the carboxyl group) Fatty acids are generally unconjugated (the double bonds have single bonds in- between them: triacylglycerols energy and storage. Glycerol and three fatty acids form three ester linkages to make a triacylglycerol/triglyceride + 3 water molecules: phospholipids membranes.