2.4. Amplification of 16S rDNA of LAB isolates
DNA from the −20 °C stock was diluted to between 10 pg and
1 μg/50 μl using nuclease-free double distilled water. The 16S rDNA
fragment was amplified by PCR with the universal primer set of 27-f
(5′-AGT TTG ATC CTG GCT CAG-3′) and 1490-r (5′-GTT ACC TTG TTA
CGA CTT C-3′) according to Chen et al. (2005) using an iCycler