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(A) PCA based on microbial community composition (family level; absolute values, estimated upon multiplying with total cell counts (cells/mL)) at different time points (0 h, 24 h, and 48 h) during the incubation of porcine colonic microbiota in presence of various amino acids versus an untreated control (blank). (B) Loadings of the families on which the PCA was based.
