Data Category chemical_conn_bond

General

Category name
chemical_conn_bond
Required in PDB entries
no
Category group membership
chemical_group
Used in current PDB entries
No

Category Relationship Diagrams

70
View full category relationship diagram including all dictionary data categories

Category Description

               Data items in the CHEMICAL_CONN_BOND category would not, in
               general, be used in a macromolecular CIF. See instead the
               ENTITY data items.

               Data items in the CHEMICAL_CONN_ATOM and CHEMICAL_CONN_BOND
               categories record details about the two-dimensional (2D)
               chemical structure of the molecular species. They allow a
               2D chemical diagram to be reconstructed for use in a
               publication or in a database search for structural and
               substructural relationships.

               The CHEMICAL_CONN_BOND data items specify the connections
               between the atoms in the CHEMICAL_CONN_ATOM list and the nature
               of the chemical bond between these atoms.

Category Example

 
    loop_
    _chemical_conn_bond.atom_1
    _chemical_conn_bond.atom_2
    _chemical_conn_bond.type
       4     1     doub     4     3     sing
       4     2     sing     5     3     sing
       6     5     sing     7     6     sing
       8     7     sing     8     3     sing
       10    2     sing     12    9     doub
       12    11    sing     12    10    sing
       13    11    sing     14    13    sing
       15    14    sing     16    15    sing
       16    11    sing     17    5     sing
       18    5     sing     19    6     sing
       20    6     sing     21    7     sing
       22    7     sing     23    8     sing
       24    8     sing     25    13    sing
       26    13    sing     27    14    sing
       28    14    sing     29    15    sing
       30    15    sing     31    16    sing
       32    16    sing