diff --git a/js/components/nglView/renderingObjects.js b/js/components/nglView/renderingObjects.js
index 54139deb4..10e58334a 100644
--- a/js/components/nglView/renderingObjects.js
+++ b/js/components/nglView/renderingObjects.js
@@ -398,6 +398,7 @@ const showDensity = ({ stage, input_dict, object_name, representations, dispatch
     opacity: input_dict.opacity || 1,
     opaqueBack: false
   };
+
   return Promise.all([
     input_dict.sigmaa_url &&
       stage.loadFile(input_dict.sigmaa_url, { ext: 'map' }).then(comp => {
@@ -419,7 +420,8 @@ const showDensity = ({ stage, input_dict, object_name, representations, dispatch
         return assignRepresentationArrayToComp(reprArray, comp);
       })
   ]).then(values => {
-    let val = [...values];
+    let val = [...values].filter(v => v !== undefined);
+    return val;
   });
 };
 
diff --git a/js/components/preview/molecule/redux/actions.js b/js/components/preview/molecule/redux/actions.js
index 912c0598f..f8fe11c4a 100644
--- a/js/components/preview/molecule/redux/actions.js
+++ b/js/components/preview/molecule/redux/actions.js
@@ -17,5 +17,5 @@ export const addImageToCache = (molId, image) => ({
 
 export const addProteindDataToCache = (molId, proteinData) => ({
   type: constants.ADD_PROTEIN_DATA_TO_CACHE,
-  payload: { molId: molId, image: proteinData }
+  payload: { molId: molId, proteinData: proteinData }
 });
diff --git a/js/components/preview/molecule/redux/dispatchActions.js b/js/components/preview/molecule/redux/dispatchActions.js
index e41118899..babc61f60 100644
--- a/js/components/preview/molecule/redux/dispatchActions.js
+++ b/js/components/preview/molecule/redux/dispatchActions.js
@@ -52,7 +52,7 @@ import { resetCurrentCompoundSettingsWithoutSelection } from '../../compounds/re
 import { selectMoleculeGroup } from '../../moleculeGroups/redux/dispatchActions';
 import { setDirectAccessProcessed } from '../../../../reducers/api/actions';
 import { MOL_TYPE } from './constants';
-import { addImageToCache } from './actions';
+import { addImageToCache, addProteindDataToCache } from './actions';
 import { OBJECT_TYPE } from '../../../nglView/constants';
 import { getRepresentationsByType } from '../../../nglView/generatingObjects';
 import { readQualityInformation } from '../../../nglView/renderingHelpers';
@@ -294,7 +294,7 @@ export const addDensity = (
 ) => dispatch => {
   dispatch(getProteinData(data)).then(i => {
     if (i && i.length > 0) {
-      data.protein_data = i[0];
+      data.proteinData = i[0];
 
       dispatch(
         loadObject({
@@ -795,7 +795,7 @@ export const getProteinData = molecule => (dispatch, getState) => {
   } else {
     return loadProteinData(code).then(i => {
       if (!proteindDataCache.hasOwnProperty(molIdStr)) {
-        dispatch(addImageToCache(molId.toString(), i));
+        dispatch(addProteindDataToCache(molId.toString(), i));
       }
       return i;
     });
diff --git a/js/reducers/ngl/dispatchActions.js b/js/reducers/ngl/dispatchActions.js
index bdd987c97..ff56d66d5 100644
--- a/js/reducers/ngl/dispatchActions.js
+++ b/js/reducers/ngl/dispatchActions.js
@@ -65,7 +65,9 @@ export const loadObject = ({
       dispatch
     })
       .then(representations => {
-        dispatch(loadNglObject(versionFixedTarget, representations));
+        if (representations && representations.length > 0) {
+          dispatch(loadNglObject(versionFixedTarget, representations));
+        }
       })
       .catch(error => {
         console.error(error);