A Red-Shifted Chlorophyll
- 10 September 2010
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 329 (5997), 1318-1319
- https://doi.org/10.1126/science.1191127
Abstract
Chlorophylls are essential for light-harvesting and energy transduction in photosynthesis. Four chemically distinct varieties have been known for the past 60 years. Here we report isolation of a fifth, which we designate chlorophyll f. Its in vitro absorption (706 nanometers) and fluorescence (722 nanometers) maxima are red-shifted compared to all other chlorophylls from oxygenic phototrophs. On the basis of the optical, mass, and nuclear magnetic resonance spectra, we propose that chlorophyll f is [2-formyl]-chlorophyll a (C55H70O6N4Mg). This finding suggests that oxygenic photosynthesis can be extended further into the infrared region and may open associated bioenergy applications.Keywords
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