Puzzle 1331: 75 Residue Monomer Design: Blueprint
The protein designed by fiendish_ghoul in this puzzle has become a solved Foldit design, the fourth player-designed protein to achieve this distinction. The protein is named "Peak6", and will appear in the PDB as 6MRS.
The same protein has appeared as a de-novo freestyle in Puzzle 1511 and an electron density in Puzzle 1516.
Unfortunately, fiendish_ghoul did not share any images for this puzzle, but the image from the Foldit protein design paper is shown here for reference.