Figure 5.

Effect of BSA on PCR inhibited by GO and its derivatives.

Notes: M: DNA marker. (A) GO (9.6 μg mL⁻¹), (B) GO-PAA (4.8 μg mL⁻¹), (C) GO-PAM (8.0 μg mL⁻¹). (D) GO-PEG (24.0 μg mL⁻¹) and (E) GO-pSB (24.0 μg mL⁻¹). The concentration of BSA in lanes 1–4 is 0 μg mL⁻¹, 2.0 μg mL⁻¹, 20.0 μg mL⁻¹ and 200.0 μg mL⁻¹, respectively.

Abbreviations: BSA, bovine serum albumin; GO, graphene oxide; PAA, polyacrylic acid; PAM, polyacrylamide; PCR, polymerase chain reaction; PEG, polyethylene glycol; pSB, poly(sulfobetaine).