Query: NC_013771:803042 Cyanobacterium UCYN-A, complete genome
Lineage: Atelocyanobacterium thalassa; Atelocyanobacterium; ; Chroococcales; Cyanobacteria; Bacteria
General Information: UCYN-A cyanobacteria are species of nitrogen-fixing marine cyanobacteria that lack the oxygen producing photosystem II complex of the photosynthetic apparatus, the enzymes of the Calvin and tricarboxylic acid cycles, as well as several enzymes involved in amino acid synthesis. The cyanobacteria live in symbiosis with photosynthetic eukaryotic cells, specifically those of a single-celled species of algae.
Subject: NC_008819:1531187 Prochlorococcus marinus str. NATL1A, complete genome
Lineage: Prochlorococcus marinus; Prochlorococcus; Prochlorococcaceae; Prochlorales; Cyanobacteria; Bacteria
General Information: This strain was collected from the north Atlantic Ocean at a depth of 30 m and was isolated by filter fractionation. This strain belongs to the 'low light-adapted' ecotype, clade I, and has a high Chl b/a2 ratio. Marine cyanobacterium. This non-motile bacterium is a free-living marine organism that is one of the most abundant, as well as the smallest, on earth, and contributes heavily to carbon cycling in the marine environment. This cyanobacterium grows in areas of nitrogen and phosphorus limitation and is unique in that it utilizes divinyl chlorophyll a/b proteins as light-harvesting systems instead of phycobiliproteins. These pigments allow harvesting of light energy from blue wavelengths at low light intensity.