diff --git a/app/controllers/mpa/pept2data_controller.rb b/app/controllers/mpa/pept2data_controller.rb
index a16a095..0f6c71a 100644
--- a/app/controllers/mpa/pept2data_controller.rb
+++ b/app/controllers/mpa/pept2data_controller.rb
@@ -27,7 +27,7 @@ def pept2data
     end
 
     @response.each do |_, value|
-      value["lineage"] = @lineages[1]
+      value["lineage"] = @lineages[value["lca"]]
     end
 
     # proteins = Set.new