Tony,<br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="font-size:14px;font-family:Calibri,sans-serif;word-wrap:break-word"><div>
<div><div> Who needs hydrogens?</div></div></div></div></blockquote><div><br></div><div>may be you need to read this (for example):</div><div><br></div><div><a href="http://www.phenix-online.org/papers/dz5209_reprint.pdf">http://www.phenix-online.org/papers/dz5209_reprint.pdf</a></div>
<div><br></div><div>?</div><div><br></div><div>Pavel</div><div> </div></div>