diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index 02fd182..c96a263 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -17,7 +17,7 @@ PRESYNAPSE
   type: comprehension
 
   expansion: 
-    VGCC-PRE_ALL: VGCC-PRE [ full: 10x, active: 5x, empty: 2x ]
+    &VGCC-PRE_ALL: VGCC-PRE [ full: 10x, active: 5x, empty: 2x ]
     @: VGCC-PRE-TUN [pass: VGCC-PRE_ALL]
 ```