diff --git a/src/encoded/schemas/experiment.json b/src/encoded/schemas/experiment.json
index b33ccb1d949..2384996492d 100644
--- a/src/encoded/schemas/experiment.json
+++ b/src/encoded/schemas/experiment.json
@@ -68,18 +68,6 @@
                         }
                     }
                 },
-                { 
-                    "properties": {
-                        "biosample_type": {
-                            "enum" : [
-                                "single cell"
-                            ]
-                        },
-                        "biosample_term_id":{
-                            "pattern": "^(CL|EFO|UBERON|NTR):[0-9]{2,8}$"
-                        }
-                    }
-                },
                 { 
                     "properties": {
                         "biosample_type": {