This puzzle features a protein designed from scratch by Foldit players! In Puzzle 1381 we asked players to try to predict the structure of this protein from the sequence alone. We have since solved the crystal structure of this protein, and here we are providing players with the refined electron density map. See the blog for more details. Players can load in solutions from Puzzle 1381 to see how their predictions fit in the electron density map, and players can try building into the electron density from an extended chain!
Hmm, that's strange. In the full electron density map, all of the residues (and most of the sidechains) are well resolved. Something must have happened when we trimmed the density map for the Foldit puzzle. I'm sorry we didn't catch that before posting the puzzle!