Flashcards in Chem: Lipids Deck (28)
what type of bond is between a glycerol & a FA?
saturated fatty acids are :
filled with H2
solid at room temp.
NO carbon-carbon double bonds
Source: lard, butter, coconut & palm oil
Monounsaturated FA have?
one carbon-carbon double bond
liquid at room temp
sources: olive oil, olives, peanuts, avocados etc.
polyunsaturated FA have?
more than one carbon-carbon double bond
liquid at room temp.
sources: sunflower, corn, cottonseed, linoleic, alpha linoleic
Essential FA are the main_ _ of fat?
body cannot make on its own
found in polyunsaturated veg. oils
when linoleic is absent which FA becomes an essential FA
what makes up a triglyceride?
3 FA + glycerol (ester bond)
what makes up a phospholipid?
2 FA + glycerol + phosphate derivative
2 series PG cox
4 series TX lox
3 series TX
5 series PG
belongs to sterol group
requires ATP, Mg, NADPH
makes cell membranes
Precursor molecules for cholesterol?
hmg coa reductase
chylomicron source? fxn? enzyme?
transports dietary lipids to body
lipoprotein lipase- fats into cells
highest % of triglycerides
VLDL source? fxn? enzyme?
transports endogenous lipids from liver to the body
lowest % of proteins
LDL source? fxn? enzyme?
transports cholesterol from liver to the body
highest % of cholesterol
HDL source? fxn? enzyme?
liver- APOA-1; APOE
removes excess free cholesterol from the blood
lecithin cholesterol acyl transferase LCAT
what does beta oxidation do? where?
cut 2 carbons off at a time to make acteyl CoA for krebs
what does beta ox. require? produces? what about odd number of carbons?
1 acetyl CoA
final piece would be a 3 carbon long propionyl CoA
ketogenesis forms? increases in? ketone bodies?
ketone bodies as a byproduct of beta oxid.
fasting; low carb diet, diabetes, pregnancy
acetoacetate, acetone, hydroxybutrate
what is the primary substrate for lipogenesis?
lipogenesis occurs in? produces? requires? stimulated by?
acetyl CoA, CO2, NADPH
ATP & insulin stimulates
EPI & glucagon inhibit.
intermediate of lipogenesis?
which is a ketogenic AA?