Fig. 6.

Relationships of proteome pI among the smallest, most basic proteomes (•, bacteria; ×, eukaryotes; +, archaea). (A) Relationship with size across complete proteomes. Only the organisms shown in this graph feature in subsequent graphs. (B) Relationship with total DNA compositional bias. (C) Relationship with the ratio of arginine (the basic amino acid with high GC in its codons) to lysine and tyrosine (the basic amino acids with high AT in their codons). (D) The relationship with proteome size among membrane proteomes.