Fig. 2
From: The phenotypic signature of adaptation to thermal stress in Escherichia coli
Plot of the first two principal components. The dots represent scores from the 115 evolved clones, each of which was replicated three times. The triangles represent the six replicates of the REL1206 ancestral strain at 42.2 °C; squares denote the ancestor at 37.0 °C. The arrows at the top of the plot illustrate directions of change relative to the two ancestral treatments (see Fig. 1 and Table 1)