FIG. 6.

T-RFLP fingerprinting of the 16S rRNA gene in density gradient fractions from day 3 of the ¹³C (A) and ¹²C (B) methane, day 6 of the ¹³C (C) and ¹²C (D) ethane, and day 6 of the ¹³C (E) and ¹²C (F) propane incubations. Major T-RFs were identified by in silico digestions of clone library sequences with MspI. Less-abundant T-RFs (<5% of the total peak area in any of the heavy fractions) were combined and are shown as “other.” Fractions with insufficient DNA for analysis are left blank.