Cardiolipin

an unusual “double” phospholipid containing four fatty acid chains

found primarily in the inner mitochondrial membrane

acts to improve the efficiency of oxidative phosphorylation, by restricting proton flow across the membrane

#Id: 7924

#XL - Q Biochemistry

Cardiolipin

an unusual “double” phospholipid containing four fatty acid chains

found primarily in the inner mitochondrial membrane

acts to improve the efficiency of oxidative phosphorylation, by restricting proton flow across the membrane

#Id: 8130

#XL - Q Biochemistry

#Id: 8129

#XL - Q Biochemistry

Some other biologically active isoprenoid compounds or derivatives.

#Id: 8127

#XL - Q Biochemistry

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 

#Id: 8126

#XL - Q Biochemistry

#Id: 8125

#XL - Q Biochemistry

Steroids derived from cholesterol.

#Id: 8120

#XL - Q Biochemistry

Arachidonic acid and some eicosanoid derivatives.