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C F Allen

Publications and source records attributed to C F Allen.

34 records · Page 2Linked to original sources
PubMed1971

Studies on seeds. IV. Lipid composition of bean cotyledon vesicles.

Lipid content has been determined for two types of lipid-rich vesicles isolated from bush bean cotyledon at 24 hr of germination. The larger, nonassociating vesicles are four to six times richer in triglyceride than the smaller vesicles which associate strongly among themselves, as well as with smooth membranes in the cell. The larger vesicles contain about 640 micromoles of phospholipid per gram of protein, while the smaller vesicles have only one-half to two-thirds as much phospholipid per gram of protein. The ratio of individual phospholipids in both kinds of vesicles is close to 20% phosphatidylethanolamine, 60% phosphatidylcholine, and 20% phosphatidylinositol. The fatty acid composition of all phospholipids is similar, and quite different from that of triglyceride, which contains twice as much linolenic acid and less than one-fourth as much palmitic acid. Pea cotyledon has quantitatively the same lipid content as bean cotyledon.

Centrifugation, Density Gradient↗
PubMed1970

Lipid composition of cyanidium.

The major lipids in Cyanidium caldarium Geitler are monogalactosyl diglyceride, digalactosyl diglyceride, plant sulfolipid, lecithin, phosphatidyl glycerol, phosphatidyl inositol, and phosphatidyl ethanolamine. Fatty acid composition varies appreciably among the lipids, but the major ones are palmitic acid, oleic acid, linoleic acid, and moderate amounts of stearic acid. Trace amounts of other acids in the C(14) to C(20) range were also present. Moderate amounts of linolenic acid were found in two strains, but not in a third. The proportion of saturated acid is relatively high in all lipids ranging from about a third in monogalactosyl diglyceride to three-fourths in sulfolipid. This may be a result of the high growth temperature. Lipases forming lysosulfolipid, and lysophosphatidyl glycerol are active in ruptured cells; galactolipid is degraded with loss of both acyl residues. Thus the lipid and fatty acid composition of Cyanidium more closely resembles that of green algae than that of the blue-green algae, although there are differences of possible phylogenetic interest.

Journal Article↗