 a specific amino acid.</span> 
 is shown on the left, the second position on the top, and the third position 
 on the right.&#160;&#160;To find the codon for any given entry on the 
 screen, position your mouse over the desired amino acid and wait for a 
 moment; a yellow hint will be displayed.</span></p>
<p style="margin-top: 0in; text-autospace: none;">&#160;</p>
<p><span style="font-size: 11.0pt;">To change the amino acid encoded by 
 any codon, click and scroll down to choose the desired amino acid. A