许多蛋白质和肽类药物必须通过注射或纳米针阵列来传递。
Many proteins and peptide drugs have to be delivered by injection or a nanoneedle array.
一些农用化学品公司，包括拜耳和先正达，一直在寻找方法使植物表达复杂的蛋白质类药物，但是进展相对缓慢。
A number of agrochemical companies, including Bayer and Syngenta, have been looking at ways to make complex protein drugs in plants, although progress has been slow.
它们可以保护胰岛素之类的蛋白质类药物免受酸 性胃液的攻击，然后在到达比较 碱 性的肠道后将蛋白质释出。
They are able to protect a protein drug such as insulin from the acidic pH of the stomach and then release it in the more alkaline pH of the intestine.
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