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<DIV>Dear users<BR>i am working with a protein witch holds a hetero-atom in it's pdb structure. the hetero-atom is named "d" and stands for "ADP+SO4" (in fact the third phosphate of ATP is being substituted with SO4). i wanted to know if gromacs holds a feature to change "d" into ATP? and if so do i need to introduce ATP for Gromacs or it is known for the program?<BR>i do appreciate your help!<BR>sajad<BR></DIV></DIV></div></body></html>