<P>
Sir,<BR>
<BR>
When i run gromacs for a metal transport protein which has carbonate and Fe ions in it which it transports. I have created .itp files for CO3, Fe and added to the database (taking help from Dr. David). <BR>
Now i face a new problem that when i use grompp to concatanate the parameter files with the .gro file it is issuing a warning <BR>
"System has non-zero charge: 2.000002e+00"<BR>
<BR>
Can i proceed with this warning?<BR>
Or what is wrong?<BR>
<BR>
thanks <BR>
<BR>
bala<BR>
<BR>
</P>
<br><br>
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