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| | PDB Format Guide, Part 32 (Site not responding. Last check: 2007-10-09) |
 | | X is the modified residue name, Y is the chain identifier, N is the sequence number, XXX is the name of the modifier, A is the atom name and B the sequence number of the atom carrying the modifier. |
 | | A is the residue name, B the chain identifier, and NN the sequence number of first base, X is the residue name, Y the chain id, and ZZ the sequence number of the second base. |
 | | AB is the atom name, I the residue name inosine, X the chain identifier, and N the sequence number of inosine, and AB is the atom name, Z the residue name, X the chain identifier, and NN the sequence number of the base which is paired with inosine. |
| www.rcsb.org /pdb/docs/format/pdbguide2.2/part_31.html (4072 words) |
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