Abstract
We describe a method for the separation of coenzyme Q and vitamin K through silicic acid column chromatography. We also report on the migration of some natural quinones in thin-layer chromatography. The analysis of neutral lipids of P18 led us to the isolation of vitamin K 8 and coenzyme Q 7, coenzyme Q 8 and coenzyme Q 9. L forms contain only vitamin K 8 and coenzyme Q 8. The amount of quinones is higher in L forms than in the bacteria. We propose the extension of the coenzyme Q nomenclature to all the quinones with a polyisoprenic side chain, specially the naphthoquinones.
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