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Sequence of the plastid rDNA spacer region of the brown alga Pylaiella littoralis (L.) Kjellm. Evolutionary significance
- Markowicz, Y., Mache, R., Loiseaux-de Goer, S.
- Plant molecular biology 1988 v.10 no.5 pp. 465-469
- protein secondary structure, ribosomal RNA, restriction mapping, evolution, ribosomal DNA, chloroplast DNA, transfer RNA, Phaeophyceae, alanine, genes, isoleucine, nucleotide sequences, genomics, intergenic DNA, molecular conformation, chloroplasts
- The DNA segment situated between the 16S and 23S rRNA genes belonging to the plastid genome of the brown alga Pylaiella littoralis (L.) Kjellm. has been sequenced. This small region (322bp) contains two unsplit tRNA genes separated by 3 bp. A comparison with similar regions from different plants shows that this region has evolved in two different ways according to the place of plants in evolution. In the "primitive" group, this region is reduced in size when compared to prokaryotes, In the other groups, it is considerably enlarged by insertion of repetitive sequences, open reading frames and introns.