=CENTER>
    <TD><IMG SRC=rnastab.gif>
    <TD><IMG SRC=proteasesite.gif>
    <TD><IMG SRC=proteinstab.gif>
    <TD><IMG SRC=rpromoter.gif>
  </TR>
  <TR ALIGN=CENTER>
    <TD><A NAME=d:rnastab>rnastab</A>
    <TD><A NAME=d:proteasesite>proteasesite</A>
    <TD><A NAME=d:proteinstab>proteinstab</A>
    <TD><A NAME=d:rpromoter>rpromoter</A>
  </TR>
  <TR ALIGN=CENTER>
    <TD><IMG SRC=rarrow.gif>
    <TD><IMG SRC=larrow.gif>
    <TD><IMG SRC=lpromoter.gif>
  </TR>
  <TR ALIGN=CENTER>
    <TD><A NAME=d:rarrow