import datetime
import os
import subprocess
+import json
res_codes = [
# 20 canonical amino acids
i=i-(chain_end[c]-chain_start[c])-3
ssbond=[ [e[0]-unres_shift[c[0]]+1,e[1]-unres_shift[c[1]]+1] for e,c in zip(ssbond,ssbond_ch)]
- return seq,ssbond
+ return seq,json.dumps(ssbond)
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