BLAST (Basic Local Alignment Search Tool) is an algorithm for comparing primary biological sequence information, such as the amino-acid sequences of different proteins or the nucleotides of DNA sequences (Wikipedia).http://www.hypothesisjournal.com/wp-content/uploads/2011/08/boutros-3-1-fig2.png Compare tara_med_examplegenome protein sequences to a custom collection of carbon fixation related genes (downloaded from KEGG) Collection contains marker genes for:CBB, Wood-Ljundahl, reductive TCA, 3-hydroxypropionate, 3-hydroxypropionate/4-hydroxybutyrate As a cyanobacteria - which carbon fixation pathway?