diff --git a/content/3.defense-systems/card_nlr.md b/content/3.defense-systems/card_nlr.md
index 013d88f4b050df564a04bb5120a771988f0f2c19..e6b6fe9bc4158786443170c7553e713481351c60 100644
--- a/content/3.defense-systems/card_nlr.md
+++ b/content/3.defense-systems/card_nlr.md
@@ -59,3 +59,15 @@ The system was detected in 57 different species.
 
 Proportion of genome encoding the CARD_NLR system for the 14 phyla with more than 50 genomes in the RefSeq database.
 
+## Structure
+
+::info
+This section is empty
+::
+
+## Experimental validation
+
+::info
+This section is empty
+::
+
diff --git a/content/3.defense-systems/cas.md b/content/3.defense-systems/cas.md
index 8952c38074aa1cd16339be9344ab87d286f96584..67a297f2f52c9853125db5b85539acdbff0de907 100644
--- a/content/3.defense-systems/cas.md
+++ b/content/3.defense-systems/cas.md
@@ -53,3 +53,16 @@ The system was detected in 2905 different species.
 ![cas](/cas/Distribution_Cas.svg){max-width=750px}
 
 Proportion of genome encoding the AbiC system for the 14 phyla with more than 50 genomes in the RefSeq database.
+
+## Structure
+
+::info
+This section is empty
+::
+
+## Experimental validation
+
+::info
+This section is empty
+::
+
diff --git a/content/3.defense-systems/ddmde.md b/content/3.defense-systems/ddmde.md
index 333cff0f5ca9a7719f773e60637843e0c7fc8b60..b0eab0524601043d1c166beec49b47a1d5092a39 100644
--- a/content/3.defense-systems/ddmde.md
+++ b/content/3.defense-systems/ddmde.md
@@ -46,3 +46,10 @@ dataUrls:
 
 ---
 ::
+
+
+## Experimental validation
+
+::info
+This section is empty
+::
\ No newline at end of file
diff --git a/content/3.defense-systems/dpd.md b/content/3.defense-systems/dpd.md
index 7672897731436f33d88c18185afa3950bc350198..272ef4b49ee3b4b62c4e38a517929494444a90e0 100644
--- a/content/3.defense-systems/dpd.md
+++ b/content/3.defense-systems/dpd.md
@@ -57,3 +57,9 @@ dataUrls:
 
 ---
 ::
+
+## Experimental validation
+
+::info
+This section is empty
+::
\ No newline at end of file
diff --git a/content/3.defense-systems/fs_hepn_tm.md b/content/3.defense-systems/fs_hepn_tm.md
index b2496c86e6f31dbc2ea38c0bc738218162e60a2b..2f22ea488e127bd974e29f7145ee8c75fbea8056 100644
--- a/content/3.defense-systems/fs_hepn_tm.md
+++ b/content/3.defense-systems/fs_hepn_tm.md
@@ -12,7 +12,11 @@ relevantAbstracts:
 
 # FS_HEPN_TM
 
-## To do 
+## Distribution of the system among prokaryotes
+
+::info
+This section is empty
+::
 
 
 ## Structure
diff --git a/content/3.defense-systems/mazef.md b/content/3.defense-systems/mazef.md
index 332b42bd3677eed469281aba8dfefff1e674ae02..fd6933201205865a055752a6878afb160a00d073 100644
--- a/content/3.defense-systems/mazef.md
+++ b/content/3.defense-systems/mazef.md
@@ -35,6 +35,11 @@ The system was detected in 993 different species.
 
 Proportion of genome encoding the MazEF system for the 14 phyla with more than 50 genomes in the RefSeq database.
 
+## Structure 
+
+::info
+This section is empty
+::
 
 ## Experimental validation
 <mermaid>
diff --git a/content/3.defense-systems/phrann_gp29_gp30.md b/content/3.defense-systems/phrann_gp29_gp30.md
index d1d2f9c886ec3dbfcdab35eb76db6faf843a1b60..d604dfb0c90d3c9461a08ec446debfbd932c07e1 100644
--- a/content/3.defense-systems/phrann_gp29_gp30.md
+++ b/content/3.defense-systems/phrann_gp29_gp30.md
@@ -31,6 +31,11 @@ The system was detected in 35 different species.
 
 Proportion of genome encoding the Phrann_gp29_gp30 system for the 14 phyla with more than 50 genomes in the RefSeq database.
 
+## Structure
+
+::info
+This section is empty
+::
 
 ## Experimental validation
 <mermaid>
diff --git a/content/3.defense-systems/wadjet.md b/content/3.defense-systems/wadjet.md
index f50cb89b95f8d40bb83297163153c39ce4e0c6de..b7cf6be62449173f33eaaef6de7e216c0c361984 100644
--- a/content/3.defense-systems/wadjet.md
+++ b/content/3.defense-systems/wadjet.md
@@ -119,3 +119,10 @@ dataUrls:
 
 ---
 ::
+
+
+## Experimental validation
+
+::info
+This section is empty
+::