cause constrictions in the pore.-->  The file could be
       displayed together with the ion channel with the program QUANTA. Conversion
       programs were then developed to convert the qpt objects so they could be displayed
       with other molecular graphics programs, such as sybyl, rasmol, mage and  
       InsightII. The direct output of molecular graphics object is now phased
       out of HOLE (see next paragraph).

       <li>The sphere centre information is  output to a pdb format co-ordinate 
 