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Sidedness studies of thylakoid phosphatidylglycerol in higher plants.


ABSTRACT: The transmembrane distribution of phosphatidylglycerol was determined in thylakoids from barley (Hordeum vulgare), lettuce (Lactuca sativa) and pea (Pisum sativum) chloroplasts. Phospholipase A2 and phospholipase D digestion and chemical-labelling methods were used. Phosphatidylglycerol was preferentially localized in the outer (stromal) leaflet. The proportion of the phospholipid in this leaflet ranged from about 66% in pea to about 75% for barley and lettuce thylakoids. One of the main fatty acids, trans-delta 3-hexadecenoic acid, was exclusively located in the outer leaflet in all three plant types. The data are discussed in relation to suggested roles for phosphatidylglycerol in thylakoid function.

SUBMITTER: Unitt MD 

PROVIDER: S-EPMC1145041 | biostudies-other | 1985 Jun

REPOSITORIES: biostudies-other

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