X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FAlignedCodonFrame.java;h=18aaecf7b5a784aa40d2a092663ae1baa1f0fb2f;hb=1488d223bc6be5b47695a8153205cc9ff8c8095d;hp=a4b99bfe453cecd5d0e6fc7b78190c83d92dc408;hpb=5cc7268518b8689fe212c481ea962a8afacc6d61;p=jalview.git

diff --git a/src/jalview/datamodel/AlignedCodonFrame.java b/src/jalview/datamodel/AlignedCodonFrame.java
index a4b99bf..18aaecf 100644
--- a/src/jalview/datamodel/AlignedCodonFrame.java
+++ b/src/jalview/datamodel/AlignedCodonFrame.java
@@ -702,7 +702,7 @@ public class AlignedCodonFrame
   }
 
   /**
-   * Returns the first mapping found that is from 'fromSeq' to 'toSeq', or null
+   * Returns the first mapping found that is between 'fromSeq' and 'toSeq', or null
    * if none found
    * 
    * @param fromSeq
@@ -713,12 +713,17 @@ public class AlignedCodonFrame
    */
   public Mapping getMappingBetween(SequenceI fromSeq, SequenceI toSeq)
   {
+    SequenceI dssFrom = fromSeq.getDatasetSequence() == null ? fromSeq
+            : fromSeq.getDatasetSequence();
+    SequenceI dssTo = toSeq.getDatasetSequence() == null ? toSeq : toSeq
+            .getDatasetSequence();
+
     for (SequenceToSequenceMapping mapping : mappings)
     {
       SequenceI from = mapping.fromSeq;
       SequenceI to = mapping.mapping.to;
-      if ((from == fromSeq || from == fromSeq.getDatasetSequence())
-              && (to == toSeq || to == toSeq.getDatasetSequence()))
+      if ((from == dssFrom && to == dssTo)
+              || (from == dssTo && to == dssFrom))
       {
         return mapping.mapping;
       }