MeSH definition : Compounds and molecular complexes that consist of very large numbers of atoms and
are generally over 500 kDa in size. In biological systems macromolecular substances
usually can be visualized using ELECTRON MICROSCOPY and are distinguished from ORGANELLES
by the lack of a membrane structure.;
MeSH synonym : substances, macromolecular; macromolecular compounds and complexes;
Compounds and molecular complexes that consist of very large numbers of atoms and
are generally over 500 kDa in size. In biological systems macromolecular substances
usually can be visualized using ELECTRON MICROSCOPY and are distinguished from ORGANELLES
by the lack of a membrane structure.