<DIV>Dear all users:</DIV> <DIV>I want to simulate a system ( protein + chromophore). I have had chromophore.gro and its top file using amb2gmx.pl,but I find I can not use them to translate PDB( protein + chromophore) file into gro and top files properly. So I need your advice about further procedure!</DIV> <DIV>Thank you very much </DIV><p> 
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