In 1961 the structure of one protein ... and she proposed that such motifs also act as helix termination signals. In 1961 the ability of a few proteins to unfold and refold was a mystery, but ...

(Image: Wikimedia Commons, CC SA 3.0) The most common type of base pairing is the Watson-Crick base pair, named after James Watson and Francis Crick, who first proposed the double helix structure ...