diff --git a/docs/building/005_comparative_genomics.md b/docs/building/005_comparative_genomics.md
index e69de29..dd8c26a 100644
--- a/docs/building/005_comparative_genomics.md
+++ b/docs/building/005_comparative_genomics.md
@@ -0,0 +1,3 @@
+# Adding Gene Families and Trees
+
+*UNDER CONSTRUCTION*
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