diff --git a/src/hub/dataload/sources/dbnsfp/dbnsfp_mapping_44a_v2.py b/src/hub/dataload/sources/dbnsfp/dbnsfp_mapping_44a_v2.py
index 92b455f5..e09206e4 100644
--- a/src/hub/dataload/sources/dbnsfp/dbnsfp_mapping_44a_v2.py
+++ b/src/hub/dataload/sources/dbnsfp/dbnsfp_mapping_44a_v2.py
@@ -266,8 +266,6 @@
                     },
                 }
             },
-
-
             "cds_strand": {
                 "type": "keyword",
                 "normalizer": "keyword_lowercase_normalizer"
diff --git a/src/hub/dataload/sources/dbnsfp/dbnsfp_parser_44a_v2.py b/src/hub/dataload/sources/dbnsfp/dbnsfp_parser_44a_v2.py
index a8f24a7a..02914f55 100644
--- a/src/hub/dataload/sources/dbnsfp/dbnsfp_parser_44a_v2.py
+++ b/src/hub/dataload/sources/dbnsfp/dbnsfp_parser_44a_v2.py
@@ -874,7 +874,7 @@ def load_file(path: str, assembly: str):
                 # We guarantee that the protein field is always a list at this moment. See prune_protein()
                 # if not isinstance(last_protein_field, list):
                 #     last_protein_field = [last_protein_field]
-                last_protein_field.append(curr_protein_field)
+                last_protein_field.extend(curr_protein_field)
 
                 last_doc["dbnsfp"]["protein"] = last_protein_field
                 continue