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Moran Yassour, a postdoctoral researcher in the labs of Eric Lander and Ramnik Xavier at the Broad Institute, is a pioneer in one of biology’s hottest fields: the human microbiome. She’s researching how the circumstances of our birth and early life influence the origin and development of the microbes in our gut.

Each cell in our body contains a thick, unique soup of proteins, culled from our genome’s recipe book. Yet, until now, identifying all the proteins at work in rare cell types—these cells’ proteome—without looking only at the usual suspects has been impossible.