[Nucleotide sequence of the barley chloroplast DNA psbA gene coding for a herbicide-binding protein]

The sequence of a stretch of the barley chloroplast DNA containing psbA gene with flanking regions and the deduced amino acid sequence of the photosystem II QB protein have been determined. Comparison of the psbA and QB sequences from barley and some dicotyledonous species shows them to be highly conserved. The sequences of the regions which flank the probable transcription initiation site for psbA gene of barley are identical to the corresponding sequences of wheat.