The following records maybe appear in a PDB summary file. The column numbers for each field are given along with the data types, as described in the PDB Contents Guide. The chain maybe blank. Residues is a string of 1 character residue letters. Residues is a string of 1 character residue letters.
Structures is a string of one character secondary structure letters.
Structures is a string of 1 character secondary structure letters. This is useful in knowning if there might be something suspect about the file that should be investigated. Copied as-is from the PDB file. Severe error indicator. Entries with this record must be used with care.