The Gram-negative alphaproteobacterium Jannaschia aquimarina GSW-M26 (DSM 28248) is a member of the Roseobacter clade. The size of the draft genome is 4.1 Mb. Genome analysis revealed the presence of genes encoding a complete gene transfer agent and aerobic anoxygenic photosynthesis. The latter indicated a photoheterotrophic lifestyle.
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