Pre_GI: SWBIT SVG BLASTN

Query: NC_018665:139646 Exiguobacterium antarcticum B7 chromosome, complete genome

Lineage: Exiguobacterium antarcticum; Exiguobacterium; Bacillales Family XII; Bacillales; Firmicutes; Bacteria

General Information: Exiguobacterium antarcticum (strain B7) is a psychotropic Gram-positive bacterium isolated from microbial biofilm at Ginger Lake, located on King George Island, Antarctic peninsula.

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BLASTN Alignment.txt

Subject: NC_015662:15641 Buchnera aphidicola (Cinara tujafilina) chromosome, complete

Lineage: Buchnera aphidicola; Buchnera; Enterobacteriaceae; Enterobacteriales; Proteobacteria; Bacteria

General Information: It is believed that the Buchnera provide the essential nutrients the host lacks. Besides a nutritional co-dependence, due to a co-existence of millions of years, Buchnera have lost the ability to produce cell surface components such as lipopolysaccharides. This makes for an obligate endosymbiont relationship between host and Buchnera. Buchnera are prokaryotic cells which belong to the gamma-Proteobacteria, closely related to the Enterobacteriaceae family. Phylogenetic studies using 16S rRNA indicate that the symbiotic relationship was established around 200-250 million years ago. Since Buchnera are closely related to Escherichia coli and Haemophilus influenzae, comparative genomic studies can shed light on the evolutionary mechanisms of intracellular endosymbiosis as well as the different underlying molecular basis between organisms with parasitic behavior and symbionts.