1946年�学家把一个不能合成甲硫氨酸和生物素的大肠杆菌株和一个不能合成苏氨酸和亮氨酸的大肠杆菌株一同培养在缺�上述四种营养物的培养基中 Template




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tomski1946年�学家把一个不能合成甲硫氨酸和生物素的大肠杆菌株和一个不能合成苏氨酸和亮氨酸的大肠杆菌株一同培养在缺�上述四种营养物的培养基中 coloring