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Southern blot of HindIII-digested genomic DNA from different listerial strains with pC11A as the probe. Lanes 1 to 11, DNA from L. monocytogenes serotype 1/2b (strain F4233 [lane 1]), serotype 4b (strains F2381, 33, 15U, and 18 [lanes 2 to 5, respectively]), and serotype 1/2a (strains Mack, G2228, G2295, and G3412 [lanes 6 to 9, respectively]). Lanes 10 to 14 contain DNA from L. grayi, Listeria welshimeri, L. seeligeri, L. innocua, and Listeria ivanovii, respectively.
