Figure 5.
Reduced dimensionality plot of PCA of amino acid usage in ribosomal proteins in 409 prokaryotes. The following shapes and shades are used for distinguishing the organisms: black circles, hyperthermophiles; dark gray circles, thermophiles; open circles, mesophiles; black squares, psychrophiles; inverted gray triangle, A. cellulolyticus; gray triangle, T. fusca; inverted open triangles, two Frankia sp. (ACN14a, CcI3), and open triangles, two Streptomyces sp. (S. avermitilis, S. coelicolor).
