Summary
The junctions JSA and JSB between the two inverted repeat regions IRA and IRB and the small single copy region of the maize chloroplast DNA have been identified by DNA sequencing. The JSA junction coincides with the initiation codon of the ndhH gene which is encoded by the adjacent region of the small single copy region. A comparison with the plastomes of rice, rye, tobacco and liverwort shows that linkage of this junction with the ndhH gene is specific for gramminean species. The amino acid sequences deduced from the ndhH genes show conserved histidine and cysteine residues which are likely to form a metal-binding domain.
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Communicated by J.-D. Rochaix
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Maier, R.M., Döry, I., Igloi, G. et al. The ndhH genes of gramminean plastomes are linked with the junctions between small single copy and inverted repeat regions. Curr Genet 18, 245–250 (1990). https://doi.org/10.1007/BF00318388
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DOI: https://doi.org/10.1007/BF00318388