A termination codon is created by RNA editing in the petunia mitochondrial atp9 gene transcript

Analysis of the cDNA of the atp9-1 gene transcript from petunia mitochondria has revealed that ten C residues of the gene sequence are edited into U in the mRNA. Seven of these edits result in amino acid changes and one introduces a stop codon before the end of the open reading frame predicted from the gene sequence. Comparison of the edited petunia sequence with other plant mitochondrial atp9 gene sequences indicates variation in the number and positions of edits required to obtain the same amino acids in ATP9 polypeptides of higher plants.