Figure 7From: The fundamental tradeoff in genomes and proteomes of prokaryotes established by the genetic code, codon entropy, and physics of nucleic acids and proteins Dependence of the purine-purine RpR (A) pyrimidine-pyrimidine YpY (B), pyrimidine-purine YpR (C), purine-pyrimidine RpY (D) dinucleotides on the genomic GC NAT . Back to article page