<div dir="ltr">Hello Everybody;<br><br>I have a problem with The 2PU3 pdb entry (download from <a href="http://www.rcsb.org">www.rcsb.org</a>) ; the download file gives for certain residues such as residu 25 : SER (and others in the pdb file), two different positions for the atoms of the residu.<br>
<br> ATOM 18 N ASER A 25<br> ATOM 19 N BSER A 25<br> ATOM 20 CA ASER A 25<br> ATOM 21 CA BSER A 25<br> .<br> .<br> .<br><br><br>why atoms are twice given, with two different positions?, are there two possible conformations for the residue?<br>
Please, it will help me much to know what atom to choose for the corresponding residue<br>( for exemple CA A SER 25, or CA B SER 25), because I need the right coordinates for a further study.<br><br> Sincerely yours,<br> Djamila Benrezkallah,<br>
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