. "ncbi_taxonomy"^^ . "purple photosynthetic bacteria"^^ . "Proteobacteria"^^ . "purple bacteria"^^ . . "GC_ID:11"^^ . "purple photosynthetic bacteria and relatives"^^ . "purple non-sulfur bacteria"^^ . "purple bacteria and relatives"^^ . "PMID:11542017"^^ . "proteobacteria"^^ . "PMID:11837318"^^ . . "PMID:11321122"^^ . "PMID:16280474"^^ .