source leaprc.protein.ff19SB
source leaprc.DNA.OL21
source leaprc.water.opc
#source leaprc.gaff2
source leaprc.openff
loadAmberParams mol_gmx_unique.frcmod 
loadAmberParams frcmod.ionslm_126_opc 
loadamberprep ATP.prep
loadamberparams ATP.frcmod 
loadamberprep ZAFF.prep #Load ZAFF prep file
loadamberparams ZAFF.frcmod #Load ZAFF frcmod file
LIG = loadmol2 mol_gmx_unique.mol2 
mol = loadpdb clean.pdb #Load the PDB file
bond mol.360.ZN mol.242.SG 
bond mol.360.ZN mol.234.SG
bond mol.360.ZN mol.235.SG
bond mol.360.ZN mol.228.NE2
savepdb mol complex_dry.pdb #Save the pdb file
saveamberparm mol complex_dry.parm7 complex_dry.rst7 #Save the topology and coordiante files
solvatebox mol TIP4PEWBOX 10.0
addions mol NA 59
addions mol CL 44
savepdb mol complex.pdb
saveamberparm mol complex.parm7 complex.rst7
quit #Quit tleap                                                         
~