Figure 4From: A pursuit of lineage-specific and niche-specific proteome features in the world of archaeaheat map and clustering on the unbiased amino acid usage profile in the methanogenic and the sulphur metabolising group. In the heat map, the column ‘other’ represents the sum of the frequencies of the rest of the amino acids i.e. those which are biased at their codon levels. The colour scheme and the clustering method is the same as described in Figure 1.Back to article page