Expression of <i>Ape1L</i> (top), <i>Ape2</i> (middle), and <i>Arp</i> (bottom) genes.

<p>RT-PCR used template RNAs extracted from a selection of strains. Genotype of each strain, indicated by PCR analysis of extracted DNA, is shown at the top. In each strain with a T-DNA insertion, <i>ape1L-1</i>, <i>ape2-1</i>, and <i>arp-2</i>, accumulation of transcript of the corresponding gene was undetectable. RNA accumulation differed among the <i>arp-1</i> base-substitution strains.</p>