Special nodes and R-groups


    Special nodes

    Name Description
    Homology groups The drop-down list contains the default homology groups.
    Pol Pseudo atom 'Pol'. This button changes the selected atom to a pseudo atom labelled Pol (polymer).
    * This button creates a '*' atom, which indicates an unspecified end group in polymers.


    These atoms can be used to describe unknown or unspecified molecule parts or to draw R-group queries or Markush structures.