diff --git a/src/scripts/component/genome-browser.ts b/src/scripts/component/genome-browser.ts
index d74a404c47271602f7275e2bfac45e6e68a2736c..8a50a290e16267a37f713fa83cb824a04a79b69f 100644
--- a/src/scripts/component/genome-browser.ts
+++ b/src/scripts/component/genome-browser.ts
@@ -17,24 +17,23 @@ export default function () {
   const selectedChromosomeComponent = SelectedChromosome();
 
   let width = 900;
-  let genomesBrowserU: Selection<SVGElement, GenomeBrowserData, SVGElement, any> | null = null;
+  let genomesBrowserU: Selection<SVGGElement, GenomeBrowserData, SVGElement, any> | null = null;
 
+  
   function genomeBrowser(
-    _selection: Selection<SVGElement, Array<GenomeBrowserData>, HTMLElement, any>,
-    w: number,
-    height: number
+    _selection: Selection<SVGGElement, Array<GenomeBrowserData>, HTMLElement, any>
   ) {
-    width = w;
+    // width = w;
     _selection.each(function (_data: Array<GenomeBrowserData>) {
       const container = select(this);
       const genomeBrowser = container
-        .selectAll<SVGElement, GenomeBrowserData>(".genome-browser")
+        .selectAll<SVGGElement, GenomeBrowserData>(".genome-browser")
         .data(_data);
 
       //ENTER
       const genomeBrowserE = genomeBrowser
         .enter()
-        .append<SVGElement>("g")
+        .append<SVGGElement>("g")
         .classed("genome-browser", true);
 
       genomeBrowserE.append("g").classed(classes.chromosomeRuler, true);
diff --git a/src/scripts/main-genome-browser.ts b/src/scripts/main-genome-browser.ts
index 8df58133c40af771b4a89d3a4d5e2a477f2a5604..9ac76bafa114ff8a4c4a0ade824c1a1fbb7cdd04 100644
--- a/src/scripts/main-genome-browser.ts
+++ b/src/scripts/main-genome-browser.ts
@@ -90,9 +90,11 @@ const state: State = {
 }
 
 
-const svg = select<SVGElement, any>("svg")
+const genomeBrowsers = select<SVGElement, any>("svg")
   .attr("width", width + 1)
-  .attr("height", height);
+  .attr("height", height)
+  .append<SVGGElement>("g")
+  .classed("genome-browsers", true);
 
 draw();
 
@@ -114,7 +116,7 @@ function draw() {
   // 
   const computedGenomeBrowserData: GenomeBrowserData =
     getGenomeBrowserData(state);
-  svg
+  genomeBrowsers
     .datum([computedGenomeBrowserData])
     .call(genomeBrowserComponent, width, height);