Protein plays unexpected role in embryonic stem cells

What if you found out that pieces of your front door were occasionally flying off the door frame to carry out chores around the house? That's the kind of surprise scientists at the Salk Institute experienced with their recent discovery that nucleoporins–proteins that act as cellular "doorways" to help manage what goes in and out of a cell's nucleus–are actually much bigger players in expressing genes than previously thought.

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