Question: Whats the most exciting experiment you have ever done?

Jeremy Green answered on 16 Jun 2011:

I took some cells from a very early frog embryo and treated them with different concentrations of some “juice” from other cells. Then I let them develop for a bit and looked at them under the microscope and analyzed which genes they had switched on. I found that different concentrations – even ones that differed by very little – made the cells do different things, like become muscle cells or nerve cells. This was exciting because it fit a theory that people had had many years previously, but I was the one to prove it was correct and to be able to say what the “juice” contained. It opened up a big field for me and others studying developmental biology.