Figure 4.
Breakthrough curve for passage of a 0.3 mg/mL HisU solution through a hydroxylated nylon membrane modified with PAA/PEI/PAA-NTA-Ni2+. The feed solution contained 0.3 mg protein/mL, and the solution flow rate was 1.0 mL/min.
Breakthrough curve for passage of a 0.3 mg/mL HisU solution through a hydroxylated nylon membrane modified with PAA/PEI/PAA-NTA-Ni2+. The feed solution contained 0.3 mg protein/mL, and the solution flow rate was 1.0 mL/min.