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Science 8 September 1967:
Vol. 157. no. 3793, pp. 1191 - 1196
DOI: 10.1126/science.157.3793.1191
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Articles

Galactosyl Diglycerides: Their Possible Function in Euglena Chloroplasts

Abraham Rosenberg 1

1 Columbia University Research Service, Goldwater Memorial Hospital, New York 10017

Illumination of euglenas grown in the dark induces the formation of chloroplasts characterized by the simultaneous appearance of chlorophyll and galactosyl diglycerides in a relatively fixed ratio. The fatty acyl chains of the galactosyl diglycerides are constructed so that they can provide a stable lock-and-key fit with the phytol chains of chlorophyll in such a way as to localize the porphyrin structures of chlorophyll and space them for efficient photoreception. Light-starved photobiotic euglenas show chloroplast shrinkage with a concurrent partial loss of galactosyl diglycerides.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Lipids and the Assembly of Chloroplast Membrane.
S. Patton (1968)
Science 159, 221
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Science. ISSN 0036-8075 (print), 1095-9203 (online)