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Partial least-squares discriminant analysis (PLS-DA) plots of the fecal microbiota of Angus steers grazing on either nontoxic (Max-Q; n = 6) or toxic (E+; n = 6) endophyte-infected tall fescue over the 28-day grazing trial (A) or 1, 2, 14, and 28 days after pasture assignment (B).