diff --git a/proteinflow/data/torch.py b/proteinflow/data/torch.py
index a31e6ca..1224d99 100644
--- a/proteinflow/data/torch.py
+++ b/proteinflow/data/torch.py
@@ -130,6 +130,7 @@ def from_args(
         cut_edges=False,
         require_antigen=False,
         require_light_chain=False,
+        require_no_light_chain=False,
         require_heavy_chain=False,
         *args,
         **kwargs,
@@ -191,6 +192,8 @@ def from_args(
             if `True`, only entries with an antigen will be included (used if the dataset is SAbDab)
         require_light_chain : bool, default False
             if `True`, only entries with a light chain will be included (used if the dataset is SAbDab)
+        require_no_light_chain : bool, default False
+            if `True`, only entries without a light chain will be included (used if the dataset is SAbDab)
         require_heavy_chain : bool, default False
             if `True`, only entries with a heavy chain will be included (used if the dataset is SAbDab)
         *args
@@ -225,6 +228,7 @@ def from_args(
             cut_edges=cut_edges,
             require_antigen=require_antigen,
             require_light_chain=require_light_chain,
+            require_no_light_chain=require_no_light_chain,
             require_heavy_chain=require_heavy_chain,
         )
         return ProteinLoader(
@@ -323,6 +327,7 @@ def __init__(
         antigen_patch_size=128,
         require_antigen=False,
         require_light_chain=False,
+        require_no_light_chain=False,
         require_heavy_chain=False,
     ):
         """Initialize the dataset.
@@ -398,6 +403,8 @@ def __init__(
             if `True`, only entries with an antigen will be included (used if the dataset is SAbDab)
         require_light_chain : bool, default False
             if `True`, only entries with a light chain will be included (used if the dataset is SAbDab)
+        require_no_light_chain : bool, default False
+            if `True`, only entries without a light chain will be included (used if the dataset is SAbDab)
         requre_heavy_chain : bool, default False
             if `True`, only entries with a heavy chain will be included (used if the dataset is SAbDab)
 
@@ -538,7 +545,10 @@ def __init__(
         if require_antigen or require_light_chain:
             to_exclude.update(
                 self._exclude_by_chains(
-                    require_antigen, require_light_chain, require_heavy_chain
+                    require_antigen,
+                    require_light_chain,
+                    require_no_light_chain,
+                    require_heavy_chain,
                 )
             )
         if self.clusters is not None:
@@ -604,7 +614,11 @@ def _check_chain_types(self, file):
         return chain_types
 
     def _exclude_by_chains(
-        self, require_antigen, require_light_chain, require_heavy_chain
+        self,
+        require_antigen,
+        require_light_chain,
+        require_no_light_chain,
+        require_heavy_chain,
     ):
         """Exclude entries that do not have an antigen or a light chain."""
         to_exclude = set()
@@ -617,6 +631,8 @@ def _exclude_by_chains(
                 to_exclude.add(id)
             if require_light_chain and "light" not in chain_types:
                 to_exclude.add(id)
+            if require_no_light_chain and "light" in chain_types:
+                to_exclude.add(id)
             if require_heavy_chain and "heavy" not in chain_types:
                 to_exclude.add(id)
         return to_exclude