diff --git a/content/2.general-concepts/0.index.md b/content/2.general-concepts/0.index.md
index e172046eb3f3596722e1cf783e73ed022206d6dc..ab2bcf2daf4d8400fc60c0bfef2dd4a475241176 100644
--- a/content/2.general-concepts/0.index.md
+++ b/content/2.general-concepts/0.index.md
@@ -1,8 +1,6 @@
 ---
 title: General Concepts
-toc: true
+toc: False
 layout: article
 ---
 
-
-This section is empty. You can help by adding to it.
\ No newline at end of file
diff --git a/content/2.general-concepts/3.phage_trigger.md b/content/2.general-concepts/3.defense-systems_trigger.md
similarity index 100%
rename from content/2.general-concepts/3.phage_trigger.md
rename to content/2.general-concepts/3.defense-systems_trigger.md
diff --git a/content/2.general-concepts/4.defense-systems_effector.md b/content/2.general-concepts/4.defense-systems_effector.md
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index 0000000000000000000000000000000000000000..2e5c1975b13f8ef5dca161a567840a8bb6c8820b
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+++ b/content/2.general-concepts/4.defense-systems_effector.md
@@ -0,0 +1,12 @@
+---
+title: Abortive Infection
+layout: article
+toc: true
+---
+
+
+This section is empty. You can help by adding to it.
+
+
+## test article
+
diff --git a/content/2.general-concepts/5.defense-systems-discovery.md b/content/2.general-concepts/5.defense-systems-discovery.md
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+++ b/content/2.general-concepts/5.defense-systems-discovery.md
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+---
+title: Discovery of defense systems
+layout: article
+toc: true
+---
+
+Defense systems are known since the birth of molecular biology. Then, more were discovered.
diff --git a/content/2.general-concepts/6.defensive-domains.md b/content/2.general-concepts/6.defensive-domains.md
new file mode 100644
index 0000000000000000000000000000000000000000..08c06c5ae19a314f9fe4cdbd2fac83731751fb94
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+++ b/content/2.general-concepts/6.defensive-domains.md
@@ -0,0 +1,7 @@
+---
+title: Defensive Domains
+layout: article
+toc: true
+---
+
+Among proteins involved in defense systems, a few domains appear to be frequent. 
diff --git a/content/2.general-concepts/7.MGE-defense-systems.md b/content/2.general-concepts/7.MGE-defense-systems.md
new file mode 100644
index 0000000000000000000000000000000000000000..4ee41cda91ea1914fc0abb040a065aef3e016d9b
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+++ b/content/2.general-concepts/7.MGE-defense-systems.md
@@ -0,0 +1,8 @@
+---
+title: Defense Systems and MGE
+layout: article
+toc: true
+---
+
+Defense systems help bacteria against mobile genetic elements (MGE), such as phage or plasmids.
+Yet, some defense systems favor certain MGE, or some MGE carry defense systems.
\ No newline at end of file
diff --git a/content/2.general-concepts/8.anti-defense-systems..md b/content/2.general-concepts/8.anti-defense-systems..md
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+++ b/content/2.general-concepts/8.anti-defense-systems..md
@@ -0,0 +1,8 @@
+---
+title: Anti Defense Systems
+layout: article
+toc: true
+---
+
+Anti defense systems are systems that act against defense system, and thus help bypass the defense mechanism.
+