              Data items in the STRUCT_MON_NUCL category record details about\
               structural properties of a nucleic acid when analyzed at the\
               monomer level. Analogous data items for proteins are given in\
               the STRUCT_MON_PROT category. For items where the value of the\
               property depends on the method employed to calculate it, the\
               details of the method of calculation are described in data items\
               in the STRUCT_MON_DETAILS category.