diff --git a/docs/interesting-pdb-entries.md b/docs/interesting-pdb-entries.md
index 9d1cd99467aab96906b4d7d15dee50a0fefc7133..3295669921d7c5251ef6d7779bcd950361b6e4e9 100644
--- a/docs/interesting-pdb-entries.md
+++ b/docs/interesting-pdb-entries.md
@@ -28,4 +28,8 @@
 * Multiple models with different sets of ligands or missing ligands (1J6T, 1VRC, 2ICY, 1O2F)
 * Long linear sugar chain (4HG6)
 * Anisotropic B-factors/Ellipsoids (1EJG)
-* NOS bridges (LYS-CSO in 7B0L, 6ZWJ, 6ZWH)
\ No newline at end of file
+* NOS bridges (LYS-CSO in 7B0L, 6ZWJ, 6ZWH)
+
+Assembly symmetries
+* 5M30 (Assembly 1, C3 local and pseudo)
+* 1RB8 (Assembly 1, I global)
\ No newline at end of file
diff --git a/src/extensions/rcsb/assembly-symmetry/prop.ts b/src/extensions/rcsb/assembly-symmetry/prop.ts
index 210a127613377120b8989496c3e96a750fdb20b3..f076ed6d6f685243dcba1c931c5cb86479b87e60 100644
--- a/src/extensions/rcsb/assembly-symmetry/prop.ts
+++ b/src/extensions/rcsb/assembly-symmetry/prop.ts
@@ -124,16 +124,20 @@ export function getSymmetrySelectParam(structure?: Structure) {
     if (structure) {
         const assemblySymmetryData = AssemblySymmetryDataProvider.get(structure).value;
         if (assemblySymmetryData) {
-            const options: [number, string][] = [];
+            const options: [number, string][] = [
+                [-1, 'Off']
+            ];
             for (let i = 0, il = assemblySymmetryData.length; i < il; ++i) {
                 const { symbol, kind } = assemblySymmetryData[i];
                 if (symbol !== 'C1') {
                     options.push([ i, `${i + 1}: ${symbol} ${kind}` ]);
                 }
             }
-            if (options.length) {
+            if (options.length > 1) {
                 param.options = options;
-                param.defaultValue = options[0][0];
+                param.defaultValue = options[1][0];
+            } else {
+                options.length = 0;
             }
         }
     }
diff --git a/src/extensions/rcsb/assembly-symmetry/ui.tsx b/src/extensions/rcsb/assembly-symmetry/ui.tsx
index 664ca9adc3784a3ff0441108a6ecd237cea888f2..bcb4a1b9a1ed1a02f1aeb6e6880aae52da21ed1d 100644
--- a/src/extensions/rcsb/assembly-symmetry/ui.tsx
+++ b/src/extensions/rcsb/assembly-symmetry/ui.tsx
@@ -73,7 +73,6 @@ export class AssemblySymmetryControls extends CollapsableControls<{}, AssemblySy
         const structure = this.pivot.cell.obj?.data;
         const params = PD.clone(structure ? AssemblySymmetryProvider.getParams(structure) : AssemblySymmetryProvider.defaultParams);
         params.serverUrl.isHidden = true;
-        params.symmetryIndex.options = [[-1, 'Off'], ...params.symmetryIndex.options];
         return params;
     }