Hierarchical clustered heatmap representation of completely sequenced cyanobacteria genomes based on a correlation matrix of the presence or absence of 13,655 orthologous groups identified in 41 cyanobacteria.

<p>The 13,655×41 matrix was imported into the R program, and Pearson correlation coefficients were calculated using the ‘gplots’ package. Colors represent correlation values ranging from 0 to 1, with green representing lowest correlation and white representing highest correlation.