Fig. 2.

Fig. 2. Gene expression of (A) spaC, (B) spaF, (C) pili, (D) pilus444, (E) pilus443, (F) pillus442, (G) pilus2370, (H) internalin, and (I) mbf from Lactobacillus rhamnosus GG (LGG) upon exposure to acid stress at pH 4.5 for 1 h or 24 h. The mean values of samples with different lowercase letters were significantly different (p < 0.05).

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