He says,because diamond mining in Kono,Kailahun and Tongo districts is slowing down, people are turning from diamonds to gold.

VOA: standard.2010.04.22

So, imagine taking two IgG's, turning one upside-down and then they're hooked together.

想象一下,有两个IgG分子,将其中一个倒置,那么两个分子将会相互钩住

耶鲁公开课 - 生物医学工程探索课程节选