All cultures contained 50 µg/ml kanamycin and 34 µg/ml chloramphenicol.
2
Cross resistance between Kanamycin and other aminoglycosides including streptomycin, gentamycin and tobramycin was found to vary markedly between isolates.
3
In conclusion, extensive use of kanamycin resistance marker genes in genetically modified crops is unjustifiable in the face of current medical applications.