entry_id,entity code 0,residue number 0,residue name 0,entity code 1,residue number 1,residue name 1,entity code 2,residue number 2,residue name 2,entity code 3,residue number 3,residue name 3,entity code 4,residue number 4,residue name 4
pdb1k2k,1,1,C,2,6,G,,,,,,,,,
pdb1k2k,1,2,G,2,5,C,,,,,,,,,
pdb1k2k,1,3,T,2,4,A,,,,,,,,,
pdb1k2k,1,4,A,2,3,T,,,,,,,,,
pdb1k2k,1,5,C,2,2,G,,,,,,,,,
pdb1k2k,1,6,G,2,1,C,,,,,,,,,