diff --git a/content/3.defense-systems/brex.md b/content/3.defense-systems/brex.md
index 68caa04c6923b2c27ce677933244f722f402ee9a..d3a36731246aaa1a11271ebb94ea6e04581d6c7f 100644
--- a/content/3.defense-systems/brex.md
+++ b/content/3.defense-systems/brex.md
@@ -32,7 +32,7 @@ BREX systems can be divided into six subtypes, and are encoded by 4 to 8 genes,
 
 However, the mechanism through which BREX Type 1 systems defend against phages is distinct from RM systems, and does not seem to degrade phage nucleic acids :ref{doi=10.15252/embj.201489455}. 
 
-To date, BREX molecular mechanism remains to be described.
+To date, the BREX molecular mechanism remains yet to be described.
 
 
 ## Example of genomic structure