Fig. 4

A fourfold dilution series of AFP was detected using AP-ELISA (a) and P-ELISA method (b). The paper used in control 1 is treated paper and in control 2 is pristine paper
A fourfold dilution series of AFP was detected using AP-ELISA (a) and P-ELISA method (b). The paper used in control 1 is treated paper and in control 2 is pristine paper