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Gene copy numbers for butyryl-coenzyme A (CoA) CoA-transferase and butyrate kinase in feces of pigs fed diets supplemented with cellulose (white bars), carboxymethylcellulose (light gray bars), low-viscosity oat β-glucan (dark gray bars), or high-viscosity oat β-glucan (black bars). The detection limit was 4 log10 gene copies/g (wet weight).
