REGRESSION OF GUANIDINE-DEPENDENCE   IN CLONED GUANIDINE-DEPENDENT POLIO VIRUSES.
D002999:Clone Cells; D004351:Drug Resistance; D004352:Drug Resistance, Microbial; D019791:Guanidine; D006146:Guanidines; D011051:Poliomyelitis; D017955:Poliovirus; D012106:Research; D012107:Research Design; D046509:Tissue Culture Techniques
D006146:Guanidines; D019791:Guanidine
DRUG RESISTANCE, MICROBIAL; EXPERIMENTAL LAB STUDY; GUANIDINES; POLIOVIRUS; TISSUE CULTURE