Ability of Agrobacterium to produce TFX with addition of pT2TFXK. Legend: Ability of F2/5(pT2TFXK) to inhibit ANU794. This inhibition is reversed by the addition of the TFX resistance genes to ANU794. Assay was performed as described in Figure 1 with F2/5(pT2TFXK) cultured in a single colony in the center of the plate. One day after growth at 28°C, the plates were sprayed with a dilute suspension of ANU794(pT2TX3K) (A) or ANU794 (B).