Although unmetabolized PAHs can have toxic effects, the major conCErn in animals is the ability of reactive metabolites to bind to proteins and DNA.
虽然非代谢变化的多环芳烃有毒性反应，但主要涉及在动物的蛋白质和DNA的代谢反应的能力。
2
You see, the human body lacks the enzyme necessary to metabolize insulin, so the substance that gives yacon its sweetness passes through the digestive tract unmetabolized.