Chemistry-MacroMol is a toolkit includes basic objects and methods to describe macromolecules, a macromolecule is just a molecule that consists of several "domains". For example, a protein consists of aminoacid residues, or a nucleic acid consists of bases. Therefore Chemistry::MacroMol is derived from Chemistry::Mol, with additional methods to handle the domains. WWW: http://search.cpan.org/dist/Chemistry-MacroMol/