Science Friday Edit this Published by Science Friday A Decade After the Genome, Scientists Map the 'Proteome' Listen Queue Download this audio Want to embed this player? Use the code below. More info. <iframe frameborder="0" scrolling="no" height="130" width="100%" src="https://www.wnyc.org/widgets/ondemand_player/wnyc/#file=/audio/json/374972/&share=1"></iframe> Share on Facebook Share on Twitter Email a Friend Nearly all the body's cells contain identical DNA. So why does a neuron grow up so differently than a liver cell? Proteins, says Akhilesh Pandey, a professor at the Johns Hopkins University.