Model of loop choices for PASC. Each color corresponds to a section from the structures selected from the PDB: 2spc (light pink), lim8 (red), 1t06 (blue), 1fzn (magenta), 1g03 (orange), and lea3 (light green). The loop 1t06 (in blue) had the lowest deviation in RMSD from the PATET helices (shown in gray, they correspond to Helix 2 and 3 of PASC), and was chosen for the PASC scaffold.