Southern blot of chromosomal DNA from various corynebacterial strains hybridized with IS14751 as the probe. (A) Lanes 1 and 7, λ HindIII molecular weight marker; lanes 2 to 6, SmaI-digested chromosomal DNA of C. glutamicum R, ATCC 14751, ATCC 13032, ATCC 13869, and ATCC 31831, respectively. (B) Lanes 1 and 9, λ HindIII molecular weight marker; lanes 2 to 8, SmaI-digested chromosomal DNA of C. glutamicum ATCC 13745, ATCC 14996, ATCC 19055, ATCC 19058, ATCC 15025, ATCC 19052, and ATCC 19053, respectively.