Table II.

Correlation of CG and CNG sites in the mtDNA and ptDNA with the nuclear C → T and G → A transitions found in Arabidopsis numtDNA and rice nuptDNA

TrinucleotidesC/G → T/A(nuptDNA)%C/G → T/A(numtDNA)%
CAA31.898.1
CAC53.021.8
CAG2011.82018.0
CAT84.710.9
Total CA21.33228.8
CCA31.810.9
CCC105.965.4
CCG42.498.1
CCT95.332.7
Total CC15.41917.1
CGA2313.61210.8
CGC169.565.4
CGG2514.876.3
CGT1710.1109.0
Total CG47.93531.5
CTA42.454.5
CTC42.421.8
CTG84.71311.7
CTT105.954.5
Total CT15.42522.5
CNGa3218.94237.8
  • a N refers to A, C, or T in the trinucleotide. CGG is included in the CG dinucleotide count. The trinucleotides (C and two downstream nucleotides) from the mtDNA and ptDNA corresponding to T mutations in the trinucleotides of the numtDNA and nuptDNA were used in the analysis. In the case of the organelle G nucleotide to the nuclear A substitution, the C and its two downstream nucleotides in its complementary strand of the mtDNA and ptDNA were used in the analysis.