diff --git a/graphein/protein/tensor/angles.py b/graphein/protein/tensor/angles.py
index 3d03f753..3fd47282 100644
--- a/graphein/protein/tensor/angles.py
+++ b/graphein/protein/tensor/angles.py
@@ -70,10 +70,18 @@ def _extract_torsion_coords(
     res_atoms = []
     idxs = []
 
+    # Whether or not the protein contains selenocysteine
+    selenium = coords.shape[1] == 38
+
     # Iterate over residues and grab indices of the atoms for each Chi angle
     for i, res in enumerate(res_types):
         res_coords = []
-        for angle_coord_set in CHI_ANGLES_ATOMS[res]:
+
+        angle_groups = CHI_ANGLES_ATOMS[res]
+        if not selenium and res == "SEC":
+            angle_groups = []
+
+        for angle_coord_set in angle_groups:
             res_coords.append([ATOM_NUMBERING[i] for i in angle_coord_set])
             idxs.append(i)
         res_atoms.append(torch.tensor(res_coords, device=coords.device))
@@ -115,6 +123,9 @@ def sidechain_torsion(
     :return: _description_
     :rtype: Union[TorsionTensor, Tuple[TorsionTensor, torch.Tensor]]
     """
+    # Whether or not the protein contains selenocysteine
+    selenium = coords.shape[1] == 38
+
     idxs, coords = _extract_torsion_coords(coords, res_types)
     angles = _dihedral_angle(
         coords[:, 0, :].unsqueeze(1),
@@ -139,7 +150,11 @@ def sidechain_torsion(
     res_types = copy.deepcopy(res_types)
     res_types.reverse()
     for res in res_types:
-        if res in ["ALA", "GLY", "UNK"]:
+        PAD_RESIDUES = ["ALA", "GLY", "UNK"]
+        if not selenium:
+            PAD_RESIDUES.append("SEC")
+
+        if res in PAD_RESIDUES:
             post_pad_len += 1
         else:
             break