anchor.diff:                                "aTargets": [ 3 ]
                               },
                               { //"sTitle": "Target Gene",
  -                              "fnRender": function(obj) {
  -                                    return '<b>'+obj.aData[ obj.iDataColumn ]+'</b>';
  +                              "mRender": function(data) {
  +                                    return '<b>'+data+'</b>';
                                 },
                                 "aTargets": [ 4 ] 
                               },
  
positive.code:                             { //"sTitle": "abs diff",
                                "bVisible": showAbsDiffColumn,
                                "sType": "num-nan-col",
                                "fnRender": function(obj) {
                                      var value = parseFloat(obj.aData[ obj.iDataColumn ]);
                                      if (isNaN(value))
                                          return "NaN";
                                      
                                      var ret = value.toFixed(2);
                                      
                                      var eps = 10e-5;
                                      var abunUnaltered = parseFloat(obj.aData[6]);
                                      var abunAltered = parseFloat(obj.aData[7]);
                                      
                                      if (value<eps)
                                          return ret;
  
negative.code:                             { //"sTitle": "Ave. Unaltered<sup>1</sup>",
                                "sType": "num-nan-col",
                                "bSearchable": false,
                                "mRender": function(data) {
                                      var value = parseFloat(data);
                                      if (isNaN(value))
                                          return "NaN";
                                      return value.toFixed(2);
  