FIG 2.

Heatmap representation of the pangenome contents of 127 Lactococcus lactis isolates. The black regions indicate orthologous groups that are present, while the gray regions indicate orthologous groups that are absent. Using hierarchal single-linkage clustering with a distance cutoff determined using the knee of the curve approach, 63 L. lactis subsp. lactis isolates clustered into 21 genetic lineages, and the remaining 64 L. lactis subsp. cremoris isolates clustered into 28 genetic lineages.