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Hematoxylin and eosin (H&E) stained sections of the intestine (200× magnification). (A) Duodenum. (B) Jejunum. (C) Ileum. BD, a corn-soybean basal diet containing the Met:SAA ratio at 0.51; L-MR, a plasma powder diet containing a low Met:SAA ratio at 0.41; H-MR, a fishmeal diet containing a high Met:SAA ratio at 0.61. Met = methionine; SAA = sulfur amino acids.
