source leaprc.protein.ff14SB
source leaprc.water.tip3p
source leaprc.gaff2

# loading parameters staple molecule
loadamberparams link.frcmod

# loading chain A with staple coordinates
# you  may to make bonds in xleap
recAL = loadpdb recal.pdb

# loading rest of the protein complex
recb = loadpdb rec_rest.pdb