FIG. 1.

Restriction map of the R. capsulatus DNA fragment carrying the sodB gene. Horizontal lines represent Rhodobacter DNA fragments in the sodB region which were cloned into pBSK (pA21 and pA22) or pPHU281 (pHSOD and pHSODK1) to produce the designated plasmids (Table 1). Restriction endonuclease cleavage sites are indicated by vertical bars. The positions of the sodB, tpl, and rarD genes were deduced from homology tests of the sequence data.