Building the biotin residue in Leap

Start xleap and load the residue from an old Prep file:

     % xleap &
     > loadamberprep biotin.prep
     > edit BTN

	


(Since the residue was loaded from a Prep file, it is
already built - atom types and charges are in the Prep.)

Save the residue in leap format:

    > saveoff BTN btn.lib

The residue can be loaded in later sessions by

    > loadoff btn.lib