in biomolecular structure description what is the normal data structure format string format

In biomolecular structure description, the normal data structure format is typically a string format. This string format is known as the Protein Data Bank (PDB) format, which is a standard file format used to store information about the three-dimensional structures of molecules. The PDB format consists of a series of records, each represented as a string of text characters, that provide information about the atoms, bonds, and other properties of the biomolecular structure.