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. Author manuscript; available in PMC: 2013 Feb 11.
Published in final edited form as: J Microbiol Methods. 2009 Sep 29;79(3):266–271. doi: 10.1016/j.mimet.2009.09.012

Fig. 3.

Fig. 3

Rarefaction analysis of the oral metagenome. The curves include only sequences which occur 3 or more times. The number of OTUs with different cutoff values was plotted as a function of the number of sequences sampled. OTUs with ≥97%, ≥95% and ≥90% pairwise sequence identity are arbitrarily assumed to form the same species, genus and family, respectively.