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(a) PCA of the profiling data from colonic microbiota. (b) The dendrogram of the T-RFLP profiles of colonic microbiota from GF mice and Ex-GF mice. (c) The number of predominant bacterial genera and groups in the Ex-GF 1, 2, 3, and 4 (first sons) and Ex-GF 5, 6, and 7 (second sons) clusters.
