Two rRNA gene clusters were detected in the genome of Bifidobacterium bifidum KCTC 3202T using Southern blot analysis. To analyse the sequences of the 16S rRNA genes from rrnA and rrnB, 16S rDNAs were amplified by PCR using DNA fragments purified from gel slices containing each of the rRNA gene clusters. The amplified 16S rDNAs from rrnA and rrnB were cloned into vectors and three clones of each gene sequenced. The resultant sequences were confirmed by direct sequencing of the 16S rDNAs from rrnA and rrnB. Sequence differences were not found between rrnA and rrnB in 1488 bp of the 16S rRNA genes.
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Yoon, JH., Yim, D.K., Goodfellow, M. et al. Sequence analysis of 16S rRNA genes amplified from two ribosomal RNA gene clusters of Bifidobacterium bifidum. Antonie Van Leeuwenhoek 75, 329–333 (1999). https://doi.org/10.1023/A:1002025100444
- Bifidobacterium bifidum
- rRNA operon
- 16S rDNA