Figure 2.

Effective number of codons used in each ORF plotted against the (C+G)3. The continuous curve plots the relationship between (C+G)3. and ENC in the absence of selection. All of spots lie below the expected curve.

Effective number of codons used in each ORF plotted against the (C+G)3. The continuous curve plots the relationship between (C+G)3. and ENC in the absence of selection. All of spots lie below the expected curve.