Having 'solved' the structure of ... as the core of the collagen molecule. This turned out to be quite reasonable because it was known that polyproline formed a helix 3, of three residues per ...

Figure 1: Pauling and Corey's first guess at the structure of collagen, showing a beautifully drawn illustration of their proposed three-chain helix: it was wrong, and they later withdrew it.

The carbon atom also forms a double bond with an oxygen atom, forming a molecular structure called a carbonyl group ... To demonstrate this, Raines and his colleagues created two interconverting ...

The study found intricate molecular mechanisms that allow proteins to survive for millions of years. Collagen is a ...