Green filamentous bacteria Chloroflexaceae

Interestingly, reaction centers of apparently all photosynthetic organisms may be assigned to one or the other of these two types. For instance, the reaction center of both purple bacteria and the green filamentous bacteria, Chloroflexaceae, and green-plant PS II are of the OQ-type. On the other hand, the green sulfur bacteria, Chlorobiaceae, the Heliobacteria, and photosystem I all have the FeS-type reaction centers. 

The Chloroflexaceae are green filamentous bacteria. They form a deep division in the eubacterial line and have an interesting combination of the characteristics found in very different and diverse groups of photosynthetic bacteria (Pierson and Castenholz,... 

According to modern taxonomy, four divisions of photosynthetic bacteria are discerned (1) the purple bacteria, the green sulfur bacteria (Chlorobiaceae), the green filamentous (or gliding) bacteria (Chloroflexaceae) and the heliobacteria. This contribution concerns the antenna properties of the last three groups groups which have been studied less extensively than the purple bacteria, but which are not less interesting from the scientific point of view. 

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