For example, bands i and j were only observed in
the 30- and 60-day old cheese samples in the presence of tetracycline
(Fig. 2B, lines 4 and 5); these bands were assigned to the genus
Enterococcus. In contrast, a prominent band matching the sequence of
Lactococcus lactis (band b) was observed in all but one cheese sample
(Fig. 2A, B and C).