Update demo.py

demo.py

@@ -379,6 +379,6 @@ def mSSubstructureSampleDemo(style,resn):
     composed_cond = conditioners.ComposedConditioner([substruct_conditioner, c_symmetry])
 
     if st.sidebar.button("Run Code with Button",key="substructure"):
-        mSSubstructureSample(preotein,composed_cond,output)
+        mSSubstructureSample(protein,composed_cond,output)
     
     display(output,style,resn)