Update brex.md minor grammar
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@@ -32,7 +32,7 @@ BREX systems can be divided into six subtypes, and are encoded by 4 to 8 genes,
@@ -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}.