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. 2020 Dec 18;17:196. doi: 10.1186/s12985-020-01468-x

Fig. 4.

Fig. 4

Effect of storage temperature on viral RNAs stability. E, RdRP and N genes from 4 non-extracted RNA samples in UTM (diluted 1/5), 4 non-extracted RNA samples in RNase-free water (dilution 1/2) and 4 RNA-extracted samples kept either at + 4 °C or − 70 °C were analyzed by rRT-PCR at day 1, day 2, day 3 and day 4. Red numbers indicate percentage of detection at day 4