modify mermaid add description

content/3.defense-systems/abih.md

@@ -18,6 +18,18 @@ relevantAbstracts:
 ---
 
 # AbiH
+
+## Description
+AbiH a system discovered in 1996 :ref{doi10.1111/j.1574-6968.1996.tb08446.x}.
+
+It one of the so-called "Abi" systems for "Abortive infection" discovered in the 90's in research related to the dairy industry :ref{doi=10.1016/j.mib.2005.06.006}. Even though their correspond to abortive infection, there mechanism of action does not necessarily correspond to an abortive infection.
+
+This system is a single gene system with no known domain (except its own PFAM).
+
+## Molecular mechanism
+
+As far as we are aware, the molecular mechanism is unknown. 
+
 ## Example of genomic structure
 
 The AbiH system is composed of one protein: AbiH.
@@ -52,12 +64,12 @@ dataUrl: /abih/AbiH__AbiH-plddts_91.3485.pdb
 ## Experimental validation
 <mermaid>
 graph LR;
-    Chopin_2005[<a href='https://doi.org/10.1016/j.mib.2005.06.006'>Chopin et al., 2005</a>] --> Origin_0
+    Prevost_1996[<a href='https://doi.org/10.1016/j.mib.2005.06.006'>Chopin et al., 2005</a>] --> Origin_0
     Origin_0[lactococci 
 <a href='https://ncbi.nlm.nih.gov/protein/CAA66252.1'>CAA66252.1</a>] --> Expressed_0[lactococci]
     Expressed_0[lactococci] ----> 936 & c2
     subgraph Title1[Reference]
-        Chopin_2005
+        Prevost_1996
 end
     subgraph Title2[System origin]
         Origin_0