using Pkg
Pkg.Registry.add("https://github.com/MurrellGroup/MurrellGroupRegistry")
Pkg.add("DLProteinFormats")
using DLProteinFormats
data = DLProteinFormats.load(PDBSimpleFlat500);
flat_chains = data[1];
chains = DLProteinFormats.unflatten(
flat_chains.locs,
flat_chains.rots,
flat_chains.AAs,
flat_chains.chainids,
flat_chains.resinds)
DLProteinFormats.writepdb("chains-1.pdb", chains) # view in e.g. chimerax or vscode protein viewer extension