From c9c28945a6808e64df5672d19105f55a871ab259 Mon Sep 17 00:00:00 2001
From: David Doty <doty@ucdavis.edu>
Date: Fri, 22 Dec 2023 11:45:30 -0600
Subject: [PATCH] fixed problem with non-unique React key when a strand has a
 5' and a 3' extension adjacent to the same domain

---
 lib/src/view/design_main_dna_sequence.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/view/design_main_dna_sequence.dart b/lib/src/view/design_main_dna_sequence.dart
index 26aedb26e..d5b8cce35 100644
--- a/lib/src/view/design_main_dna_sequence.dart
+++ b/lib/src/view/design_main_dna_sequence.dart
@@ -244,7 +244,7 @@ class DesignMainDNASequenceComponent extends UiComponent2<DesignMainDNASequenceP
       ..startOffset = start_offset
       ..style = style_map);
     return (Dom.text()
-      ..key = 'extension-dna-'
+      ..key = 'extension-dna-${ext.is_5p ? "5'" : "3'"}'
           'H${ext.adjacent_domain.helix},${ext.adjacent_domain.start}-${ext.adjacent_domain.end}'
       ..dy = dy)(text_path_props(subseq));
   }