Assertion: dietary threonine | /r/HasProperty | reduced to ∼20% of the requirement
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Source sentences:
text: With dietary threonine reduced to ∼20% of the requirement recommended by the National Research Council (21), IG-D piglets experienced a fourfold increase in plasma urea concentrations, which corresponded with a doubling of urinary nitrogen excretion and much lower nitrogen retention (Table 1).