Figure 1.

SOMs for 10-kb sequences of 65 bacterial genomes. (A,B,C) Di-, tri-, and tetra-SOMs, respectively. Lattices that include sequences from more than one species are indicated in black, and those that include sequences from a single species are indicated in color as detailed in the figure above. (D,E,F) G+C% for each weight vector in di-, tri-, and tetra-SOMs, respectively. G+C% for each lattice vector was divided into five categories containing an equal number of lattices. The highest, second-highest, middle, second-lowest, and lowest G+C% categories are shown in dark red, light red, white, light blue, and dark blue, respectively. (G) Classification by the initial weight vectors set by PCA for the di-SOM. Lattices are colored as described in A–C.