fix auth_comp_id property access

src/mol-model/structure/structure/properties.ts

@@ -52,7 +52,7 @@ const atom = {
     auth_atom_id: p(l => !Unit.isAtomic(l.unit) ? notAtomic() : l.unit.model.atomicHierarchy.atoms.auth_atom_id.value(l.element)),
     label_alt_id: p(l => !Unit.isAtomic(l.unit) ? notAtomic() : l.unit.model.atomicHierarchy.atoms.label_alt_id.value(l.element)),
     label_comp_id: p(compId),
-    auth_comp_id: p(l => !Unit.isAtomic(l.unit) ? notAtomic() : l.unit.model.atomicHierarchy.atoms.auth_comp_id.value(l.unit.residueIndex[l.element])),
+    auth_comp_id: p(l => !Unit.isAtomic(l.unit) ? notAtomic() : l.unit.model.atomicHierarchy.atoms.auth_comp_id.value(l.element)),
     pdbx_formal_charge: p(l => !Unit.isAtomic(l.unit) ? notAtomic() : l.unit.model.atomicHierarchy.atoms.pdbx_formal_charge.value(l.element)),
 
     // Derived