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The pH effects on the interaction between INP-P (GII.4) BL21s and romaine lettuce. Binding ability was shown as percentage. LE, leaf extract; VE, vein extract; PGM, porcine gastric mucin. The means and standard deviations from independent experiments were presented. Error bars represented standard deviation. Statistical differences of p < 0.01 were indicated by two asterisks.
