Figure 1.

Northern blots of transcripts of the ndhH–D operon and gel sections used for transcript elution. After electrophoresis of barley RNA, lanes were northern blotted with probes S₂ (the exons of ndhA, generated by RT–PCR from spliced ndhA transcripts), S₃ (the intron of ndhA) and S₅. The gel sections used to isolate RNA are indicated at the left of the northern lanes. Sizes (kb) of the main transcripts detected by northern blot and of the RNAs from the gel section are also indicated.