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Hi!<BR>
I am attempting to simulate a protein with a modified amino acid using the Gromacs force field with hydrogens for NMR. I have built the RTP and TOP files using PRODRG. <BR>
I need to know what is the rtp file? relevant to the above force field such that I can append my rtp file. Is it the ffgmx2.rtp or&nbsp; ffgmx.rtp?<BR>
Thanks<BR>
Jayant James<BR>

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Jayasundar Jayant&nbsp;James <br>
Postdoc, <br>
Department of&nbsp;Veterinary and&nbsp;Comparative Anatomy,&nbsp;Pharmacology and&nbsp;Physiology(VCAPP), Washington&nbsp;state university,&nbsp;Pullman 99164-6520,&nbsp;USA. <br>
http://www.chick.com/reading/tracts/0001/0001_01.asp <br>
Phone office:335-5937,&nbsp;Cell:1-509-432-5790<br><br>
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