Chemically, the proteins that run most of a cell's functions are little more than a string of amino acids. Their ability to perform structural and catalytic functions is primarily dependent upon the ...
Sealed letters folded in intricate patterns have gone unread for more than 300 years, but now people have been able to tease out their contents with a combination of X-ray imaging and unfolding ...
Three hundred years ago, before envelopes, passwords and security codes, writers often struggled to keep thoughts, cares and dreams expressed in their letters private. One popular way was to use a ...
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