Add time:08/09/2019         Source:sciencedirect.com

Dolichols of Tetrahymena pyriformis were isolated and characterized by TLC, HPLC and mass spectrometry. Four strains of Tetrahymena were studied and found to have relatively small amounts of dolichol, from 0.26 to 2.60 mg dolichol/kg wet weight. All four strains had approximately the same relative proportions of isoprenologs, dolichol-13 (2%), dolichol-14 (74%), dolichol-15 (23%), and dolichol-16 (< 1%).Tetrahymena dolichols were found mainly in the mitochondrial subcellular fraction (86%). The pellicle fraction contained 9% and the microsomal fraction, 5% of the remaining dolichol. Free dolichol has also been found in the mitochondrial fraction of four other organisms.We were not able to demonstrate dolichyl esters in these organisms, but their presence is inferred, because reduced yields of dolichol were obtained if the lipid extracts were not saponified prior to HPLC assay.

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