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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Rice chloroplast RNA polymerase genes: the absence of an intron in rpoC1 and the presence of an extra sequence in rpoC2.

The chloroplast genome contains sequences homologous to the Escherichia coli rpoA, rpoB and rpoC genes. The chloroplast rpoC gene is divided into rpoC1 and rpoC2, of which rpoC1 contains an intron. Comparison of the rice rpo genes with those from tobacco, spinach and liverwort revealed unique features of the rice genes; the lack of an intron in rpoC1 and the presence of an extra sequence of 381 bp in rpoC2. The intron in rpoC1 is thus optional, and possible intron boundary sites in split rpoC1 genes can be estimated by comparison with rice rpoC1. The extra sequence is located in the middle of rpoC2 and has repeated structures. The amino acid sequence deduced from this sequence is extremely hydrophilic and anionic. The origin and function of this sequence are discussed.[1]

References

  1. Rice chloroplast RNA polymerase genes: the absence of an intron in rpoC1 and the presence of an extra sequence in rpoC2. Shimada, H., Fukuta, M., Ishikawa, M., Sugiura, M. Mol. Gen. Genet. (1990) [Pubmed]
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