unpublished data from DSMZ.
Nakamura, L. K., Roberts, M. S., Cohan, F. M. (1999). Relationship of Bacillus subtilis clades associated with strains 168 and W23: a proposal for Bacillus subtilis subsp. subtilis subsp. nov. and Bacillus subtilis subsp. spizizenii subsp. nov. Int.J.Syst.Bacteriol. 49 : 1211-1215 . http://www.ncbi.nlm.nih.gov/pubmed/10425781
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