FIG. 1.

Schematic drawing showing the genetic organization, restriction map, and protein-encoding regions of the chromosomal site affected in the Synechocystis mutant 549 (A), the corresponding site of the Synechocystis WT (B), and the insertion sites of the aphII gene in selected sites of the different genes to obtain mutants with single mutations (C). Empty arrows, protein-encoding regions in Synechocystis; darkly shaded arrows, inserted aphII gene cassettes; black arrows, regions sequenced in this work; ∗, partial deleted genes; lightly stippled arrow, deletion that occurred during integration of an aphII gene in mutant 549.