SC-BLSOM and BLSOM with DegeTetra in 5 Kb sequences from 817 microbial genomes. (a) SC-BLSOM. (b) BLSOM. (c) The original input data were mapped on SC-BLSOM. Lattice points that include sequences from more than one species are indicated in black, those that contain no genomic sequences are indicated in white, and those containing sequences from a single species are indicated in colors.