Nucleic Acids Research, 1988, Vol. 16, No. 6 2461-2472
© 1988
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Expression of the rpl23, rpl2 and rps19 genes in spinach chloroplasts
Laboratoire de Biologie Moléculaire Végétate, CNRS UA 1178, Université de Grenoble I BP 68, F-38402, St Martin d'Hères, France
*To whom correspondance should be address
Received December 29, 1987. Revised February 22, 1988. Accepted February 22, 1988.
The expression of the spinach rp123, rp12 and rps19 chlcroplast genes has been studied The rp123 gene identified in tobacco and Marchantia is split into two overlapping reading frames in spinach. S1 mapping has shown that initiation sites could occur upstream of each reading frames. A large transcription unit is also present covering the rp12 and rps19 genes. The rp19 and rp12 gene products are identified by NH2-terminal amino acid sequences. They correspond to spinach chloroplast ribosomal proteins CS-S23 and CS-L4, respectively No product of the rp123 gene was detected in the chlorcplast 50S ribosomal subunit. This strongly suggest that a corresponding gene has been transfered into the nucleus
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