The structure of this protein has already been solved and published, but close inspection suggests that there are some problems with the published solution. We'd like to see if Foldit players can use the same electron density data to reconstruct a better model. There's 5 copies of the protein in this one, so it gets pretty large, and the Trim tool is recommended.
Residues GA and QVSGPER are not modeled in PDB chain A and neither are they in this puzzle. The modelling status in PDB matches this puzzle in general.