Fig. 4
COG functional hierarchical classifications. Comparison of the COG classified reads of the Spirulina-S1 and the M-R metagenomes obtained with the MG-Rast metagenome analyzer (E-value 1e−5; min 60 % identity; 15 bp min length). Only those categories with hits are represented. X axis: (I) Information storage and processing: J, translation, ribosomal structure and biogenesis; K, transcription; L, replication, recombination and repair; (II) Cellular processes and signaling: D, cell cycle control, cell division, chromosome partitioning; M, cell wall/membrane/envelope biogenesis; N, cell motility; O, posttranslational modification, protein turnover, chaperones; T, signal transduction mechanisms; U, intracellular trafficking, secretion and vesicular transport; V, defense mechanisms; (III) Metabolism: C, energy production and conversion; E, amino acid transport and metabolism; F, nucleotide transport and metabolism; G, carbohydrate transport and metabolism; H, coenzyme transport and metabolism; I, lipid transport and metabolism; P, inorganic ion transport and metabolism; Q, secondary metabolites biosynthesis, transport and catabolism; (IV) Poorly characterized: R, general function prediction only; S, function unknown