Hello every one!

I want to convert a sequence of d-amino acids or a sequence of d-amino acids and L-amino acids to a PDB file.

 How can I construct such PDB file? I know that this is possible to enter the sequence of L-amino acids in CHIMERA (uppercase characters of the amino acids for example: LFVVA), But regarding d-peptides and retro-inverso peptides I don't know the exact way of building PDB files.

Regards,

Mohsen Asadbegi