Insulin features a mutatant form of insulin. Somewhat helpfully, the puzzle even links to 1A7F in the PDB.
Insulin is a Foldit Education puzzle. There is no similar puzzle in the Foldit Campaign.
Insulin is another "challenge" puzzle, where the goal is a high score, but there are not many clues on how to achieve it.
The puzzle help includes a link to 1A7F in the PDB. The PDB entry shows what the protein looks like folded up, but the puzzle includes only a portion of the PDB entry. Players must figure out what part of 1A7F is being shown.
One hint: although small, this puzzle contains more than one cysteine segment. So there's the possibility of forming a disulfide bridge, which may help clarify things.
As before at the challenge level, most Foldit tools are available on this puzzle.