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本试验将体重250～350g的雌性无特定病原体豚鼠,按限制饲料中蛋白质(卵白蛋白30%或10%)和锌(50μg/g或无)的含量分成4组(在低蛋白组中以玉米淀粉补足热量):
In this experiment, female specific pathogen guinea pigs weighing 250-350 g were divided into four groups according to the content of restricted protein (egg albumin 30% or 10%) and zinc (50 μg / g or none) (in low protein group, corn Starch make up calories):