FIG. 3.
Fibrinolysis by recombinant Y. pestis KIM D34 and E. coli XL1. Bacteria (107 cells) in buffer were pipetted onto fibrin plates containing 5 μg/ml Plg, and dissolution of the clot was assessed after incubation for 20 h (E. coli) or 48 h (Y. pestis) at 37°C. (A) Bacterial numbering: 1, Y. pestis KIM D34(pSE380); 2, Y. pestis KIM D34(pMRK1); 3, Y. pestis KIM D34(pPlaT259I). (B) Bacterial numbering: 1, E. coli XL1(pSE380); 2, E. coli XL1(pMRK1); 3, E. coli XL1(pPlaT259I); 4, E. coli XL1(pMRK1.51); 5, E. coli XL1(pMRK3); 6, E. coli XL1(pMRK3.51).