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. 2013 Jun 6;8(6):e65249. doi: 10.1371/journal.pone.0065249

Figure 3. PCR-DGGE profiles(A, B, C) of the bacterial diversity of five different snow samples and an outdoor sample collected on different dates of the year 2010 in Beijing.

Figure 3

(A) direct PCR-DGGE; (B) liquid culturing followed by PCR-DGGE, (C) liquid-plate culturing followed by PCR-DGGE; 2–6: snow samples collected in Beijing from five different occurrences that happened on March 14, 8, 1, Feb 7 and January 1 of 2010; the analysis of bacterial diversity in snow samples was based on the mixture of five independent snow samples collected from locations on each individual date; DI water was used as negative control for PCR-DGGE analysis.