"Proteobacteria delta subdivision"^^ . "Purple bacteria, delta subdivision"^^ . "Deltaproteobacteria"^^ . . "GC_ID:11"^^ . "PMID:16403855"^^ . "delta subgroup"^^ . "PMID:11837318"^^ . "delta subdivision"^^ . . . "delta proteobacteria"^^ . "d-proteobacteria"^^ . "NCBITaxon:32015"^^ . "ncbi_taxonomy"^^ .