A>
    <TD><A NAME=d:fivepoverhang>fivepoverhang</A>
    <TD><A NAME=d:threepoverhang>threepoverhang</A>
    <TD><A NAME=d:noverhang>noverhang</A>
  </TR>
  <TR ALIGN=CENTER>
    <TD><IMG SRC=assembly.gif>
    <TD><IMG SRC=signature.gif>
    <TD><IMG SRC=insulator.gif>
    <TD><IMG SRC=ribosite.gif>
  </TR>
  <TR ALIGN=CENTER>
    <TD><A NAME=d:assembly>assembly</A>
    <TD><A NAME=d:signature>signature</A>
    <TD><A NAME=d:insulator>insulator</A>
    <TD><A NAME=d:ribosite>ribosite</A>
  </TR>
  <TR ALIGN