anchor.diff:  						gene, mutationMap[gene], response, diagramOpts);
   
   				var pdfButton = mainView.$el.find(".diagram-to-pdf");
  +				var svgButton = mainView.$el.find(".diagram-to-svg");
   				var toolbar = mainView.$el.find(".mutation-diagram-toolbar");
   
   				// check if diagram is initialized successfully.
  
positive.code: 					console.log("Error initializing mutation diagram: %s", gene);
  					toolbar.hide();
  				}
  
  				// add listener to the pdf button
  				pdfButton.click(function (event) {
  
negative.code: 						yLabels.attr("y", yy + yShift);
  					};
  
  					// submit pdf form
  					submitForm(alterDiagramForPdf, diagram, "svg-to-pdf-form");
  				});
  
  				// TODO draw mutation table
  