Fat Burning
Starvation/fasting
Glucose
Glycogen
Glycolysis, TCA, ETC
Energy (ATP)
Glucose
Glycolysis, TCA, ETC
ATP
Starvation/fasting
Hydrolysis
TCA cycle & ETC
ATP
Oxidation
Fatty acid oxidation
It is a process by which fatty acids are broken down into acetyl coA for ATP production
8 molecules
Types of oxidation
α
β
ω
1
2
n
Location - mitochondira
Fatty acids
Mitochondria
Fatty acids
Acetyl coA
Cytosol
Fatty acid oxidation
Activation of fatty acids
Transport of fatty acyl-CoA from the cytosol into mitochondria
Cytosol
Mitochondria
M Membrane
Fatty acyl coA
Acyl Carnitine
Fatty acyl coA
Carnitine
Carnitine
Acetyl coA
TCA cycle and ETC
ATP
Free fatty acids
Beta oxidation
Summary
Complete palmitic acid oxidation
7 NADH + 7 FADH2 + 8 acetyl-CoA in 7 cycles
One acetyl-CoA yields
3 NADH + 1 FADH2 + 1 GTP (=ATP) in TCA cycle
Eight acetyl-CoA yields
24 NADH + 8 FADH2 + 8 GTP (=ATP) in TCA cycle
Beta oxidation + TCA cycle
31 NADH + 15 FADH2 + 8 GTP (=ATP) in TCA cycle
Total ATP production
NADH 31 × 3 = 93 (Activation uses 2ATP)
FADH2 15 × 2 = 30
GTP 8 × 1 = 8
Total = 131. Net ATP = 131 - 2 = 129