Figure 3

(a) Positions of seven mesophiles, seven hyperthermophiles and N. equitans on the plane defined by first and third axes generated from COA on amino acid usage of encoded proteins. (b) Relationship between optimal growth temperature (OGT) of the organisms and the number of genes having ratio of positively charged and negatively charged residues greater than one (P/N ratio > 1) in the encoded proteins of respective organisms. (c) Plot for the distribution of genes versus predicted isoelectric point (pI) of encoded proteins. (d) Distribution of genes on the basis of aromaticity of encoded proteins. Green color indicates mesophiles, red color indicates hyperthermophiles and pink color indicates N. equitans.