FIG. 1.

Ethidium bromide-stained agarose gel of randomly amplified fragments of B. subtilis chromosomal DNA. Amplification was performed with primer GTTTCCGCCC as described in reference 9. Lane 1, rifampin- and novobiocin-resistant clinical isolate; lane 2, EG-RN strain; lane 3, chloramphenicol-resistant clinical isolate; lane 4, EG-CM strain; lane 5, B. subtilis ATCC 6633; lane 6, B. subtilis reference strain Marburg; lane 7, molecular weight standard (phage ΦX174 cut with restriction enzyme HaeIII).