struct pdbFileSecondaryStructureRecord {
pdbFileSecondaryStructureMode mode;
pdbSecondaryStructureHelix* helix;
pdbSecondaryStructureSheet* sheet;
pdbSecondaryStructureTurn* turn;
pdbSecondaryStructureNo* no;
pdbFileSecondaryStructureRecord* top;
pdbFileSecondaryStructureRecord* prev;
pdbFileSecondaryStructureRecord* next;
};