For instance, a company named Curis, based in Cambridge, Mass., has devised small molecules that regulate the production of sonic hedgehog, a factor that plays a role in neural development.

• 例如，一家位在美国麻州剑桥的库里斯公司，已经设计出一种可以调节音速小子合成的小分子，这种生长因子在神经发育上扮有一角。