diff --git a/PerturbAtlas/Signatures of Differentially Expressed Genes for Gene Perturbations/PerturbAtlas.ipynb b/PerturbAtlas/Signatures of Differentially Expressed Genes for Gene Perturbations/PerturbAtlas.ipynb
index 4ba080e..a8d6038 100644
--- a/PerturbAtlas/Signatures of Differentially Expressed Genes for Gene Perturbations/PerturbAtlas.ipynb	
+++ b/PerturbAtlas/Signatures of Differentially Expressed Genes for Gene Perturbations/PerturbAtlas.ipynb	
@@ -102,7 +102,8 @@
     "                                        .replace('+','')\n",
     "                                        .replace('-','')\n",
     "                                        .replace('*','')\n",
-    "                                        .replace('@',''))\n",
+    "                                        .replace('@','')\n",
+    "                                        .strip('_'))\n",
     "pertframe"
    ]
   },