Lipids

Lipid

Insoluable organic substancewhich are extractable by nonpolar solvents(ether or benzene)
Simple lipids
Fatty acids, waxes, triglycerides
Compound lipids
Phospholipids, sphingolipids, terpanes, sterol derivatives
Fatty Acid

Composed of long chain organic acids. Saturated-no double bonds

Unsaturated-double bonds

Fatty Acid

Palmitic

16C

hexadecanoic

anoic=no 2 bond

fatty acid

stearic

 

18c

octadecanoic acid

Fatty acid

Oleic

18C

cis 9 octadecenoic acid

enoic=2 bond

most common

Fatty Acid

Linoleic

18C

cis 9,12 octadecadienoic acid

di=2

Fatty Acid

Linolenic

18C

cis 9,12,15 octadecatrienoic acid

triglycerides

composed of 3 long chained fatty acids esterfied to glycerol

long term storage

simple(same) mixed(different)

Aglycerols or neutral fats-names

waxes

esters of long chain fatty FA and long chain alcohols

14-34Cs

phospholipid

polar lipid- 1 of the hydroxyl groups of glycerol esterfied w/phosphoric acid instead of fatty acid

polar head nonpolar tail

important phospholipids?
cephalins, phosphatidic acid
sphingolipids and glcolipids
glycerol is replaced by an amino alcohol-sphingosine
cerebrosides
ceramide (FA+sphingosine) + sugar
terepenes

reapted units of isoprene (2 mythl 1,3 butadine)

vita A, D, E, K and carotene

function of lipids

storage-intracellular storage depots

structural-components of membranes

functional-chem messengers, vitamins, etc.

steriods

derivatives of perhydrocyclopentanophenanthrene

nucleus

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