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The Atypical Fatty Acid

Isolation and identification of the unknown fatty acid was first performed using liver lipids of the case of Richterich et al. (1963), (Klenk and Kahlke [Pg.370]

Sources Case EMW from Hansen (1965). All samples from EMW had been preserved in formalin for about 2 years. [Pg.372]

Kahlke and Richterich 1965) and plasma lipids of Refsum s (1946) case T. E. (Kahlke 1964 a). Methods and results were identical in both instances although a nuclear resonance spectrum was obtained only in the first case and a complete mass spectrometric analysis only in the second case. Phytanic acid was isolated by preparative gas-liquid chromatography from a mixture of fatty acid methyl esters. Traces of stearic acid were removed as the urea inclusion compound by treatment with a saturated methanolic solution of urea (Cason et al. 1953). After repeated crystallization from acetone at minus 70—80 C and drying under vacuum at minus 10 C, phytanic acid was obtained as a white crystalline powder with a melting point of minus 7—6 C. At room temperature phytanic acid is a colorless, odorless oil. The lack of hydrogen uptake with exhaustive [Pg.372]

demonstration of phytanic acid in plasma and organ lipids of patients with HAP by gas-liquid chromatography has eliminated differential diagnostic difficulties and is pathognomonic for the disease. [Pg.374]


Chloroplast membranes have a characteristic and unusual fatty acid composition. Typically, 18 3, or a combination of 18 3 and 16 3, fatty acids account for approximately two-thirds of all the thylakoid membrane fatty acids and over 90% of the fatty acids of MGD, the most abundant chloroplast lipid. The atypical fatty acid A3,trans-hexadecenoate (trans-l6 l) is present as a component of the major thylakoid phospholipid, PG. The fact that these and other characteristics of chloroplast lipids are common to most or all higher plant species suggests that the lipid fatty acid composition is important for maintaining photosynthetic function. [Pg.13]


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