Figure 1. Schematic diagram of class 1 integrons from Stenotrophomonas maltophilia isolates. A), isolates 1893 and 9431. B) isolates 489, 9189, and 12221; C) isolates 3438 and 3444. Arrows depict direction of transcription, and shaded boxes represent gene cassettes found within the integron. The dark circles represent the 59-bp region immediately 5′ to the incorporated gene cassette.