Here are instructions in case you run into trouble. They will help you avoid common mistakes, such as uploading a file with only one chain, files with odd naming conventions, or files that contain non-amino/nucleic acid groups in ATOM records.

Required input

Upload Instructions

Jobs that are both private and anonymous will only be accessible via the link given at the time of submission.

The KFC Server is free for academic and non-commercial users. Others should contact Julie Mitchell for licensing information.


(case-sensitive input)
(case-sensitive input)

Private Job
Note: You may leave the chain identifiers blank if your PDB file contains a complex of exactly two chains separated by a TER record. Do not upload structures containing only a single chain, as this will return an error.