Читать книгу Molecular Mechanisms of Photosynthesis - Robert E. Blankenship - Страница 61

Chlorophyll b is identical to chlorophyll a except at the C‐7 position, where a formyl group replaces the methyl group. This change shifts the maximum absorption to shorter wavelengths. Chlorophyll b is the major accessory light‐absorbing pigment in light‐harvesting complexes in the majority of eukaryotic photosynthetic organisms, including plants and green algae, and is not found in reaction center complexes. In photosynthetic prokaryotes, it is found only in the prochlorophytes, in some cases as divinyl chlorophyll b.