diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index 809f9d9..c97c385 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -10,7 +10,7 @@ Intro:
   - is expanded and developed by: [AXON](axon.md)
   - is tuned by: [ORGANISM](../../organism.md), organs, modules
   - expands and tunes: [PRE_VGG](pre_vgcc.md)
-  - develops [_Ca2](), [_Rrp]()
+  - develops [_Ca2], [_Rrp]
 
 ```Gen
 PRESYNAPSE