The MAXIT Program Suite was developed by the PDB (Protein Data Bank) and NDB (Nucleic Acid Database) to assist in the processing and curation of macromolecular structure data. The functions of the program suite are summarized as follows: (1) Reading and writing PDB and mmCIF format files, and translating between file formats. (2) Performing a variety of consistency checks on coordinates, sequence, and crystal data. (3) Constructing, transforming, and merging information between formats in order to minimize the human intervention during file translation and data processing operations. (4) Residue numbering in the coordinate section is aligned with the sequence (5) Atoms in standard and nonstandard residues and atoms in ligands are reordered and renamed in a standard manner. The residue and ligand description is held in mmCIF dictionary. (6) Detection of missing or additional atoms. Note: Binary distribution of this tool contains an additional submodule "procheck", which does additional structure checking. This submodule is not part of the source distribution. Therefore the users are advised to use the binary distribution, if possible. Refer to README-source or README-binary, depending on the distribution, for details on installation, build, demos and application usage.