diff --git a/frontend/src/components/trackVis/CallingCardTrack.js b/frontend/src/components/trackVis/CallingCardTrack.js
index f3709cee..313adabd 100644
--- a/frontend/src/components/trackVis/CallingCardTrack.js
+++ b/frontend/src/components/trackVis/CallingCardTrack.js
@@ -143,10 +143,10 @@ class CallingCardTrack extends React.PureComponent {
             <tr>
               <th scope="col">Value</th>
               <th scope="col">Strand</th>
-              <th scope="col">String</th>
+              <th scope="col">Annotation</th>
             </tr>
           </thead>);
-        const rows = cards.slice(0, 10).map((card,i) => <tr key={i}><td>{card.value}</td><td>{card.strand}</td><td>{card.string}</td></tr>);
+        const rows = cards.slice(0, 10).map((card,i) => <tr key={i}><td>{card.value}</td><td>{card.strand}</td><td>{card.annotation}</td></tr>);
         return <table className="table table-striped table-sm">{head}<tbody>{rows}</tbody></table>;
     }
 
diff --git a/frontend/src/model/CallingCard.ts b/frontend/src/model/CallingCard.ts
index 6d2c6dd2..38f2ad06 100644
--- a/frontend/src/model/CallingCard.ts
+++ b/frontend/src/model/CallingCard.ts
@@ -5,7 +5,7 @@ import BedRecord from '../dataSources/bed/BedRecord';
 enum CallingCardColumnIndex {
     VALUE=3,
     STRAND=4,
-    STRING=5
+    ANNOTATION=5
 };
 
 
@@ -25,7 +25,7 @@ class CallingCard extends Feature {
      * Constructs a new CallingCard, given a string from tabix
      *
      */
-    string: any;
+    annotation: any;
     value: number;
     relativeX: number; // Store relative position of CallingCard in visualizer
     relativeY: number; // Used to find nearest CallingCard to cursor for tooltip; also for downsampling
@@ -33,7 +33,7 @@ class CallingCard extends Feature {
         const locus = new ChromosomeInterval(bedRecord.chr, bedRecord.start, bedRecord.end);
         super('', locus, bedRecord[CallingCardColumnIndex.STRAND]);
         this.value = Number.parseFloat(bedRecord[CallingCardColumnIndex.VALUE]);
-        this.string = bedRecord[CallingCardColumnIndex.STRING];
+        this.annotation = bedRecord[CallingCardColumnIndex.ANNOTATION];
     }
 }