Update pd-lambda-3.md (issue #215)

Updated the structure of the page, and the description of the system.

content/3.defense-systems/pd-lambda-3.md

@@ -10,9 +10,20 @@ tableColumns:
     Activator: Unknown
     Effector: Unknown
     PFAM: PF09509
+contributors:
+    - Héloïse Georjon
+relevantAbstracts:
+    - doi: 10.1038/s41564-022-01219-4
 ---
 
 # PD-Lambda-3
+
+## Description
+PD-Lambda-3 systems were discovered to be anti-phage systems during an experimental screen performed on *E.coli* :ref{doi=10.1038/s41564-022-01219-4}
+
+## Molecular mechanisms
+As far as we are aware, the molecular mechanism is unknown.
+
 ## Example of genomic structure
 
 The PD-Lambda-3 system is composed of 2 proteins: PD-Lambda-3_B and, PD-Lambda-3_A.
@@ -83,13 +94,4 @@ 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: 10.1038/s41564-022-01219-4
-
----
-::