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Molecular movie observes key biological process — in a trillionth of a second

Researchers have just made the first molecular movie of one of nature’s fastest and most important biological processes — observing how retinal changes shape when hit by light. Retinal is critical to vision and many other light-driven processes. It is a small molecule that nestles into the binding site of a specialized protein in the cell membrane. In our eyes, retinal molecules bind to opsin signaling proteins to form visual...