diff --git a/content/3.defense-systems/gao_ppl.md b/content/3.defense-systems/gao_ppl.md
index 036156d0503de82bb793c2d5c68fa9d05ac94fcd..ce5bfbcbaef3e5931614863867e7764a95cbd530 100644
--- a/content/3.defense-systems/gao_ppl.md
+++ b/content/3.defense-systems/gao_ppl.md
@@ -9,9 +9,22 @@ tableColumns:
     Sensor: Unknown
     Activator: Unknown
     Effector: Unknown
+contributors:
+  - Florian Tesson
+relevantAbstracts:
+  - doi: 10.1126/science.aba0372
 ---
 
 # Gao_Ppl
+
+## Description
+
+Gao_Ppl or Ppl system is a single gene system. This system was discovered among other in :ref{doi=10.1126/science.aba0372}. This single gene system is described with 2 different domains: PHP (Polymerase and Histidinol Phosphatase) which is a putative nuclease and an ATPase domain.
+
+## Molecular mechanism
+
+As far as we are aware, the molecular mechanism is unknown.
+
 ## Example of genomic structure
 
 The Gao_Ppl is composed of 1 protein: PplA.
@@ -71,12 +84,4 @@ end
     style Title3 fill:none,stroke:none,stroke-width:none
     style Title4 fill:none,stroke:none,stroke-width:none
 </mermaid>
-## Relevant abstracts
 
-::relevant-abstracts
----
-items:
-    - doi: 10.1126/science.aba0372
-
----
-::