It should be noted that in the aforementioned experiments (Fig. 3 and Fig. 4) for testing the barcode assay principle, both the printed and detection regions are printed on paper with yellow ink; no colorimetric reactions were involved.
It should be noted that in theaforementioned experiments (Fig. 3 and Fig. 4) for testing thebarcode assay principle, both the printed and detectionregions are printed on paper with yellow ink; no colorimetricreactions were involved.