Center for Agricultural Biotechnology and University of Maryland, College Park, MD 20742, USA
Department of Botany, University of Maryland, College Park, MD 20742, USA
Present address: Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94143, USA
* Corresponding author.
A 114-basepair fragment at 5'-upstream of the gene oee2-A from Nicotiana tabacum encoding the 23kD polypeptide of oxygen-evolving complex of photosystem II was found, through database search, to have high sequence similarity with segments in the mitochondria! genome of Oenothera, watermelon and wheat. This observation is supported by the Southern hybridization data. Repeated sequences were also found in the nuclear-mitochondrial homologous region. However, the function of these repeats is yet to be determined.
DNA homologies, nad, nuclear-mitochondrial sequence similarity, oxygen-evolving complex, photosystem II
