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( Outer mitochondrial membrane)
The outer mitochondrial membrane, which encloses the entire organelle, has a protein-to-phospholipid ratio similar to the eukaryotic plasma membrane (about 11 by weight). It contains numerous integral proteins called porins, which contain a relatively large internal channel (about 2-3 nm) that is permeable to all molecules of 5000 daltons or less. Larger molecules can only traverse the outer membrane by active transport through mitochondrial membrane transport proteins. The outer membrane also contains enzymes involved in such diverse activities as the elongation of fatty acids, oxidation of epinephrine (adrenaline), and the degradation of tryptophan. a href="/Urea_cycle_link.html" title="Urea cycle">urea cycle (Ornithine transcarbamoylase)
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Outer mitochondrial membrane Subcategories
Outer mitochondrial membrane Articles
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