Number of rRNA operons (except for two Prochlorococcus strains from the eMIT9313 clade (which have 2))

Value 1 rRNA operon
Organism Cyanobacteria Prochlorococcus marinus
Reference Martiny AC et al., Taxonomic resolution, ecotypes and the biogeography of Prochlorococcus. Environ Microbiol. 2009 Apr11(4):823-32. doi: 10.1111/j.1462-2920.2008.01803.x. p.830 left column 2nd paragraphPubMed ID19021692
Comments p.830 left column 2nd paragraph:"It is important to note that there is variation in the number of rRNA (and ITS [intergenic transcribed spacer]) copies among bacteria, including Prochlorococcus. Of all the Prochlorococcus genomes sequenced to date, however, only two from the eMIT9313 clade have two rRNA operons all other Prochlorococcus genomes have only one. Obviously [investigators] do not know how many operons novel lineages contain, including the potential for variation within the major clades. Given this uncertainty of rRNA copies in each cell, [they] simplified [their] analysis by assuming one copy per cell for all cells."
Entered by Uri M
ID 111756