Dear Erik: I want to study a molecular used the opls force field!And my molecule is not a protien.How I can get the .top file. And how i can get the atomic charges of each atom? Thank in advances. sincerely yours PeiQuan Chen --http://www.eyou.com --Îȶ¨¿É¿¿µÄÃâ·Ñµç×ÓÐÅÏä ÓïÒôÓʼþ Òƶ¯ÊéÇ© ÈÕÀú·þÎñ ÍøÂç´æ´¢...ÒÚÓÊδ¾¡