diff --git a/src/apps/viewer/extensions/cellpack/data.ts b/src/apps/viewer/extensions/cellpack/data.ts
index a22c19df55c30710da796768856498e91e044b21..ff393fac6d2e8526608b6f50af7d9aa763b37de9 100644
--- a/src/apps/viewer/extensions/cellpack/data.ts
+++ b/src/apps/viewer/extensions/cellpack/data.ts
@@ -41,12 +41,11 @@ export interface Packing {
     ingredients: { [key: string]: Ingredient }
 }
 
-export interface Positions
-{
+export interface Positions {
     coords?: Vec3[];
 }
-export interface Radii
-{
+
+export interface Radii {
     radii?: number[];
 }
 
@@ -54,21 +53,25 @@ export interface Ingredient {
     source: IngredientSource;
     results: [Vec3, Quat][];
     name: string;
-    positions?: [Positions];//Vec3[]];CoarseGraind Beads coordinates LOD
-    radii?: [Radii];//number[]];CoarseGraind Beads radii LOD
+    /** Vec3[]];CoarseGraind Beads coordinates LOD */
+    positions?: [Positions];
+    /** number[]];CoarseGraind Beads radii LOD */
+    radii?: [Radii];
     /** Number of `curveX` properties in the object where `X` is a 0-indexed number */
     nbCurve?: number;
     /** Curve properties are Vec3[] but that is not expressable in TypeScript */
     [curveX: string]: unknown;
-    principalAxis?: Vec3; /** the orientation in the membrane */
-    offset?: Vec3;  /**offset along membrane */
+    /** the orientation in the membrane */
+    principalAxis?: Vec3;
+    /** offset along membrane */
+    offset?: Vec3;
 }
 
 export interface IngredientSource {
     pdb: string;
-    bu?:string;  /** biological unit e.g AU,BU1,etc.. */
-    selection?:string; /** NGL selection or :A or :B etc.. */
-    model?:string;     /** model number e.g 0,1,2... */
+    bu?: string;  /** biological unit e.g AU,BU1,etc.. */
+    selection?: string; /** NGL selection or :A or :B etc.. */
+    model?: string;     /** model number e.g 0,1,2... */
     transform: {
         center: boolean;
         translate?: Vec3;
diff --git a/src/apps/viewer/extensions/cellpack/model.ts b/src/apps/viewer/extensions/cellpack/model.ts
index 9c8caa68e5da1b8ffaa86205436be0554aa807bb..5ef48f02eff4e741a53a8b8f59350e9f5c413b96 100644
--- a/src/apps/viewer/extensions/cellpack/model.ts
+++ b/src/apps/viewer/extensions/cellpack/model.ts
@@ -389,26 +389,24 @@ async function loadMembrane(name: string, plugin: PluginContext, runtime: Runtim
     const url = `${params.baseUrl}/membranes/${name}.bcif`
     //
     const file = (ingredientFiles)?ingredientFiles[fname]:null;
+    // can we check if url exist
     let membrane
-    if (!file)
-    //can we check if url exist
-   { 
-       membrane = await state.build().toRoot()
-        .apply(StateTransforms.Data.Download, { label: name, url, isBinary: true }, { state: { isGhost: true } })
-        .apply(StateTransforms.Data.ParseCif, undefined, { state: { isGhost: true } })
-        .apply(StateTransforms.Model.TrajectoryFromMmCif, undefined, { state: { isGhost: true } })
-        .apply(StateTransforms.Model.ModelFromTrajectory, undefined, { state: { isGhost: true } })
-        .apply(StateTransforms.Model.StructureFromModel)
-        .commit()
-    }
-    else {
+    if (!file) {
         membrane = await state.build().toRoot()
-        .apply(StateTransforms.Data.ReadFile, { file, isBinary: true, label: file.name }, { state: { isGhost: true } })
-        .apply(StateTransforms.Data.ParseCif, undefined, { state: { isGhost: true } })
-        .apply(StateTransforms.Model.TrajectoryFromMmCif, undefined, { state: { isGhost: true } })
-        .apply(StateTransforms.Model.ModelFromTrajectory, undefined, { state: { isGhost: true } })
-        .apply(StateTransforms.Model.StructureFromModel)
-        .commit()        
+            .apply(StateTransforms.Data.Download, { label: name, url, isBinary: true }, { state: { isGhost: true } })
+            .apply(StateTransforms.Data.ParseCif, undefined, { state: { isGhost: true } })
+            .apply(StateTransforms.Model.TrajectoryFromMmCif, undefined, { state: { isGhost: true } })
+            .apply(StateTransforms.Model.ModelFromTrajectory, undefined, { state: { isGhost: true } })
+            .apply(StateTransforms.Model.StructureFromModel)
+            .commit()
+    } else {
+        membrane = await state.build().toRoot()
+            .apply(StateTransforms.Data.ReadFile, { file, isBinary: true, label: file.name }, { state: { isGhost: true } })
+            .apply(StateTransforms.Data.ParseCif, undefined, { state: { isGhost: true } })
+            .apply(StateTransforms.Model.TrajectoryFromMmCif, undefined, { state: { isGhost: true } })
+            .apply(StateTransforms.Model.ModelFromTrajectory, undefined, { state: { isGhost: true } })
+            .apply(StateTransforms.Model.StructureFromModel)
+            .commit()
     }
 
     const membraneParams = {