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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
size=3><FONT face="Times New Roman">Yes.<SPAN style="mso-spacerun: yes">
Two H</SPAN>B's (ligand-receptor) and one interaction between charged nitrogen
</FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
size=3><FONT face="Times New Roman">on ligand and negative aspartic acid of the
receptor. </FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
size=3><FONT face="Times New Roman">Michal<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office"
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