Thiocapsa pfennigii

Aside from C. vinosum, type III-PHA synthases have so far been detected exclusively in the phototrophic purple sulfur bacteria such as Thiocystis viol-acea [51] and Thiocapsa pfennigii [26, 57] and in cyanobacteria such as Synechocystis sp. PCC6803 [49] or Synechococcus sp. MAI 9 [58]. In contrast, the photosynthetic nonsulfur purple bacteria possess type I-PHA synthases. 

Chromatium vinosum D Thiocystis violaceae 2311 Thiocapsa pfennigii 9111 Synechocystis sp. PCC6803... 

BPh are BChl b and BPh b in most of the other species that have been characterized, they are BChl a and BPh a. (BChl b differs from BChl a in having a vinyl group on ring II in place of an ethyl group. Thiocapsa pfennigii, another bacterial species that contains BChl b, resembles Rp.viridis in its photochemical activities [119,171].) Reaction centers isolated from Cf. aurantiacus are unusual in having three molecules of BChl a and three of BPh a, instead of four BChls and two BPhs [46,93]. 

Class-III PhaCs have been detected in unoxygenic phototrophic bacteria like Allochromatium vinosum or Thiocapsa pfennigii and occur also in cyanobacteria... 

III Allochromatium v mosum Thiocapsa pfennigii Synechocystis sp. PCC6803 3HAsci-CoA (3HAmci-CoA [-C6-C8], 4HAsci-CoA, 5HAsci-CoA)... 

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