Figure 6.
Physical mapping of the relA gene. (A) Slot blots using total YAC DNA from an ordered YAC library, probed with DNA fragment harboring the M. xanthus relA gene. (B) Schematic of the 3.6- to 4.8-Mb region of the physical map of M. xanthus. YACs covering this region are indicated and labeled at the bottom. The position of relA is designated by the shaded box. The top line represents AseI and SpeI fragments as designated by Chen et al. (1990); the second line represents the position of previously mapped markers (Shimkets 1993).