diff --git a/content/3.defense-systems/abi2.md b/content/3.defense-systems/abi2.md
index e437512fc5db1101fd9bc3dd5557f026bb0a3542..306dc01418857d0a8a69e54aeef648ebf93fb56c 100644
--- a/content/3.defense-systems/abi2.md
+++ b/content/3.defense-systems/abi2.md
@@ -20,7 +20,7 @@ relevantAbstracts:
 
 ## Description
 
-The Abi2 system corresponds to a group of abortive infection system: [AbiD](/defense-systems/abid), AbiD1 and AbiF.
+The Abi2 system corresponds to a group of abortive infection systems: [AbiD](/defense-systems/abid), AbiD1 and AbiF.
 
 The Abi2/AbiD1 system of lactococci is composed of a single protein Abi_2 :ref{doi=10.1016/j.mib.2005.06.006}. Expression of the protein is toxic to the bacteria and is therefore highly regulated. Expression of the protein is triggered by the orf1 of phage bIL66 which results in inhibition of the phage RuvC-like endonuclease activity and stops phage multiplication. 
 
@@ -54,5 +54,46 @@ Proportion of genome encoding the Abi2 system for the 14 phyla with more than 50
 
 ## Structure 
 
+### Abi2/AbiD
+
+##### Example 1
+
+::molstar-pdbe-plugin
+---
+height: 700
+dataUrls:
+   - /abid/AbiD__AbiD.cif
+
+---
+::
+
+
 ## Experimental validation 
 
+As Abi2 is a group of different Abortive infection systems, here is the experimental validation of AbiD:
+
+<mermaid>
+graph LR;
+    Chopin_2005[<a href='https://doi.org/10.1016/j.mib.2005.06.006'>Chopin et al., 2005</a>] --> Origin_0
+    Origin_0[lactococcal plasmid  
+<a href='https://ncbi.nlm.nih.gov/protein/AAA63619.1'>AAA63619.1</a>] --> Expressed_0[lactococci]
+    Expressed_0[lactococci] ----> 936 & c2 & P335
+    subgraph Title1[Reference]
+        Chopin_2005
+end
+    subgraph Title2[System origin]
+        Origin_0
+end
+    subgraph Title3[Expression species]
+        Expressed_0
+end
+    subgraph Title4[Phage infected]
+        936
+        c2
+        P335
+end
+    style Title1 fill:none,stroke:none,stroke-width:none
+    style Title2 fill:none,stroke:none,stroke-width:none
+    style Title3 fill:none,stroke:none,stroke-width:none
+    style Title4 fill:none,stroke:none,stroke-width:none
+</mermaid>