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Temperature-sensitive Mutants of Respiratory Syncytial Virus

机译:呼吸道合胞病毒的温度敏感突变体

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Four conditional-lethal temperature-sensitive mutants of RS virus were detected among the progeny of 454 plaques derived from virus grown in the presence of 10?4m 5-fluorouridine. These mutants were stable (reversion frequency, 10?5.0 or less and failed to produce plaques at 38 or 39 C. Plaquing efficiency was depressed 100-fold or more at 37 C. Variable suppression of growth at the restrictive temperature of 39 C was observed, ranging from 16-fold to complete suppression. The temperature-sensitive defect of three of the mutants appeared to affect functions which were expressed late in the replicative cycle. One of the mutants produced atypical nonsyncytial plaques.
机译:在10 4℃5-氟氨氨酸存在下生长的病毒生长的454个斑块的后代,检测到RS病毒的四个条件 - 致死的温度敏感突变体。这些突变体是稳定的(逆转频率,10 5.0 或更少,并且未在38或39℃下产生噬斑,在37℃下抑制100倍或更高。在37℃下抑制生长观察到39℃的限制性温度,从16倍到完全抑制。三个突变体的温度敏感缺陷似乎影响复制循环晚期表达的功能。其中一个突变体产生了非典型的非合成斑块。

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