diff --git a/mutalyzer/templates/gbupload.html b/mutalyzer/templates/gbupload.html
index 375e7383bc8af0da29c376a0a810524a9a1e6c6d..25ff89e63b6027a62b9ac857a270c21d2f02d523 100644
--- a/mutalyzer/templates/gbupload.html
+++ b/mutalyzer/templates/gbupload.html
@@ -60,6 +60,11 @@
             <span id="gene_label">
               <i>Please enter the Gene symbol and organism name without spaces
               and specify the length of the flanking sequences</i>
+              <br>
+              <b>Note:</b> This uses
+              the <a href="http://www.ncbi.nlm.nih.gov/sites/gquery">NCBI
+              Entrez</a> search engine and is therefore based on the current
+              Entrez assembly for the given organism (GRCh37/hg19 for human).
             	<table>
              		<tr>
                   <td>Gene symbol</td>