diff --git a/content/3.defense-systems/drt.md b/content/3.defense-systems/drt.md
index 748644c8741c94fda465adcca6f8401fd7c54cb1..f8d11e8430ad2c260e8f49d61ff921dc8c1c3421 100644
--- a/content/3.defense-systems/drt.md
+++ b/content/3.defense-systems/drt.md
@@ -10,9 +10,37 @@ tableColumns:
     Activator: Unknown
     Effector: Unknown
     PFAM: PF00078
+contributors: 
+  - Helena Shomar
+  - Marie Guillaume
+relevantAbstracts:
+  - doi: 10.1093/nar/gkac467
+  - doi: 10.1126/science.aba0372
 ---
 
 # DRT
+
+## Description
+DRT stands for Defense-associated Reverse Transcriptases.
+DRTs are a widespread and highly diverse family of defense systems, characterized by reverse transcriptase (RTs) components with antiphage properties. These RTs belong to the so-called group of unknown RTs (UG) and are closely related to the Abortive Infection system (Abi) RTs.
+
+DRT systems were experimentally validated in _Escherichia coli_ and demonstrated to be effective against an array of diverse phages.
+So far, DRTs have been classified in 9 different types. Essential components of each DRT type are:
+- DRT Type 1:   UG1  (RT-nitrilaseTM domains)
+- DRT Type 2:   UG2  (RT domain)
+- DRT Type 3:   UG3  (RT domain), UG8 (RT domain) and ncRNA
+- DRT Type 4:   UG15 (RT-alphaRep domains)
+- DRT Type 5:   UG16 (RT domain)
+- DRT Type 6:   UG12 (RT-alphaRep domains)
+- DRT Type 7:   UG10 (PrimS-RT-alphaRep domains)
+- DRT Type 8:   UG7  (RT-alphaRep-PDDExK domains)
+- DRT Type 9:   UG28 (RT-alphaRep domains) and ncRNA
+
+
+## Molecular mechanism
+To our knowledge, the molecular mechanism is unknown. 
+Similarly, for the other systems of this family, the molecular mechanism remain unknown. 
+
 ## Example of genomic structure
 
 The DRT system have been describe in a total of 9 subsystems.
@@ -267,14 +295,5 @@ 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: 10.1093/nar/gkac467
-    - doi: 10.1126/science.aba0372
-
----
-::