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. 2021 Apr 21;12:640932. doi: 10.3389/fmicb.2021.640932

Figure 4.

Figure 4

Analytical sensitivity of the Visual RT-LAMP based on the HNB colorimetric assay showing the relative reaction tubes: purple color indicates negative samples, while blue color indicates the positive ones. For each reaction tube, the corresponding agarose gel is shown above. L = 100 bp DNA Ladder (GeneSpin).