anchor.diff:          amplimers, the "promoter" amplimers, are positioned adjacent to the 5' end of
           annotated genes.  Rana and Micklem (unpublished).<br/></p>
   
  -        <p>The purpose of designing the tiling array in this way was to allow the "promoter" 
  -        amplimers to be organised into separate plates to allow the printing of "promoter" 
  +        <p>The purpose of designing the tiling array in this way was to allow the "promoter"
  +        amplimers to be organised into separate plates to allow the printing of "promoter"
           only arrays.  In order to satisfy the need for these
           promoter amplimers and to attempt to cover the genome optimally, the
           genome was divided into "tiling path spans".  All spans started or
  
positive.code:   <node path="ProbeSet.dataSets" type="DataSet">
    </node>
    <node path="ProbeSet.dataSets.title" type="String">
      <constraint op="=" value="Affymetrix array: Drosophila\\_2" description="" identifier="" code="A">
      </constraint>
    </node>
  </query>
  
negative.code:         depending on relative orientation but are useful in order to
          understand the relationship between amplimers.<br/></p>
  
          <p>The Flymine GBrowse views below show the relationship between spans, PCR primers
          and PCR products.  The PCR products that overlap a promoter region are highlighted:</p>
  
          <div style="margin-left: 20px">
  