H. Sekiguchi et al., A single band does not always represent single bacterial strains in denaturing gradient gel electrophoresis analysis, BIOTECH LET, 23(15), 2001, pp. 1205-1208
DNA in a denaturing gradient gel electrophoresis (DGGE) band that could not
be sequenced after recovery from the gel was cloned into a TA cloning vect
or and a library was constructed and then 13 clones randomly picked up from
the library was sequenced. Although the excised DNA from the DGGE gel show
ed a single band, the library consisted of several different sequences phyl
ogenetically. This phenomenon was also observed in several other DGGE bands
. Therefore, this suggests that a single DGGE band does not always represen
t a single bacterial strain and a new bias for quantitative analyses based
on band intensities has been identified.