Table 5.

Comparative data on the photosynthetic apparatus and electron carriersa

Sp.RCAbsorption peak(s) (nm)RC-bound cyt c (molecular mass in kDa)No. and molecular mass (kDa) of soluble cyt cNo. and molecular mass (kDa) of membrane-bound cyt cUbiquinone (mmol/g of dry cells)
LHILHIIQ9Q10
Sandaracinobacter sibiricus +867Absent37.01 (14.0)2 (30.0, 37.0)0.060.71
Erythromonas ursincola +867Absent40.03 (6.5, 9.0, 14.0)4 (14.3, 21.0, 24.0, 40.0)ND0.11
Roseococcus thiosulfatophilus +856Absent44.02 (4.0, 6.5)4 (21.5, 23.0, 26.0, 44.0)NANA
Roseobacter denitrificans +87080642.02 (13.5, 14.5)NAND+
Erythromicrobium ramosum +868798, 832Absent2 (8.0, 14.3)3 (8.0, 26.0, 30.0)0.090.19M
Erythromicrobium ezovicum +868800, 832Absent2 (8.0 14.3)2 (30.0, 34.0)0.020.3
Erythromicrobium hydrolyticum +866799, 833Absent1 (14.3)2 (21.0, 30.0)0.020.01M
Erythrobacter litoralis +868AbsentAbsent4 (14.0, 21.5, 24.0, 26.0)2 (30.0, 35.0)NANA
Erythrobacter longus +870AbsentAbsent2 (12.5, 17.0)NAND+
  • a The data for P. neustonensisand A. rubrum are not available. Species were cultivated under dark-aerobic conditions. Symbols and abbreviations: +, present; ND, not detected; NA, data not available; M, in addition to ubiquinone Q10 the methylated form was revealed.