diff --git a/arbdmodel/ssdna_two_bead.py b/arbdmodel/ssdna_two_bead.py
index 9d45bff2b369126564270094ac95722266d508a1..b077e914e9b6fbe34f083e968ae40374567f2c76 100644
--- a/arbdmodel/ssdna_two_bead.py
+++ b/arbdmodel/ssdna_two_bead.py
@@ -30,7 +30,7 @@ class DnaStrandFromPolymer(Group):
     p = PointParticle(_P, (0,0,0), "P")
     b = PointParticle(_B, (3,0,1), "B")
     nt = Group( name = "nt", children = [p,b])
-    nt.add_bond( i=p, j=b, bond = get_resource_path('two_bead_model/BPB.dat') )
+    nt.add_bond( i=p, j=b, bond = get_resource_path('two_bead_model/BPB.dat'), exclude = True )
 
     def __init__(self, polymer, **kwargs):
         self.polymer = polymer