diff --git a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/LibraryEntityRegistrator.java b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/LibraryEntityRegistrator.java
index 98dada26ba66e3637092345a924a1a0422f25b57..c3c2e31deae3b3662c7d9fd4c9d2b672e0189755 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/LibraryEntityRegistrator.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/LibraryEntityRegistrator.java
@@ -179,10 +179,8 @@ public class LibraryEntityRegistrator
         {
             String wellCode = extractor.getWellCode(row);
             String wellIdentifier = plateId + ":" + wellCode;
-            String oligoMaterialProperty =
-                    oligoId + " (" + ScreeningConstants.SIRNA_PLUGIN_TYPE_NAME + ")";
-            String geneMaterialProperty =
-                    geneId + " (" + ScreeningConstants.GENE_PLUGIN_TYPE_CODE + ")";
+            String oligoMaterialProperty = oligoId;
+            String geneMaterialProperty = geneId;
             saveWell(wellIdentifier, experimentIdentifier, plateId, oligoMaterialProperty,
                     geneMaterialProperty);
         }