1D31

1D31 is an alphanumeric identifier that can function as a key or reference code within various information systems. Four-character codes like this are common for their compactness and ease of indexing in databases, inventories, and catalogs.

In the Protein Data Bank context, four-character IDs are used to identify deposited macromolecular structures. If 1D31 appears as a PDB ID, it would designate a specific structure entry, accompanied by metadata such as the method used to determine the structure, resolution, organism, and the coordinates of the atoms. The full record, including links to related data and visualization tools, would be available through the PDB entry page or its API.

Beyond biology, 1D31 may also serve as a model number, part number, or catalog code in manufacturing, electronics, library systems, or other inventories. The exact meaning of the code is determined by the issuing organization and the system in which it is used. Different domains may assign the same four-character combination to completely different items, so context is essential for correct interpretation.

Because a single code like 1D31 can have multiple, domain-specific meanings, identifying its exact reference requires consulting the relevant database, catalog, or documentation. When encountered, users should locate the corresponding entry’s context to confirm what 1D31 refers to in that particular setting.