Map of the gldI region of F. johnsoniae. Restriction sites are indicated as follows: B, BglII; E, EcoRI; RV, EcoRV; and S, SacI. Kilobase pair positions 2, 4, and 6 are indicated. The presence (+) or absence (−) of complementation of gldI mutants by fragments cloned into shuttle vectors is indicated beneath the map.