A tryptophan-requiring mutant of poliovirus.
D030015:Enterovirus C, Human; D011051:Poliomyelitis; D017955:Poliovirus / Q000208:ethnology*; D012107:Research Design; D046509:Tissue Culture Techniques; D014364:Tryptophan / Q000494:pharmacology*; D014780:Viruses
D014364:Tryptophan
POLIOMYELITIS VIRUSES/culture; TISSUE CULTURE; TRYPTOPHAN/pharmacology