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Physicochemical Characterization of a Neonatal Calf Diarrhea Virus

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PMC
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  • Chemistry
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Abstract

Physicochemical characteristics of two isolates of a neonatal calf diarrhea virus were investigated. Neither isolate was sensitive to ether or chloroform, both were stable at pH 3.0, were relatively heat resistant, but were thermolabile when heated to 50°C for one hour in the presence of 1.0 M MgCl2. Multiplication of virus was not inhibited by concentrations of 5-iodo-2'-deoxyuridine (IDUR) up to 500 µg/ml, which indicated that the nucleic acid was ribonucleic acid (RNA). Also, multiplication was not inhibited by concentrations of actinomycin D (AD) up to 0.5 µg/ml. Thermal denaturation studies demonstrated that the nucleic acid had a high melting temperature.

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