Dear Phenix bulletin board users, I would like to know if there is a way to introduce a partial or a fractional charge for a given atom in a structure subjected to a refinement with phenix.refine ? It is maybe totally useless to put a charge equal to -0.5 instead of -1 for an oxygen which is involved in a non-covalent binding with an ion but I didn't found any information about that... I thank you a lot in advance. Romain. -- ----- -------- ---------------------------------------------------------- Romain TALON Extremophile and Large Molecular Assemblies Team (E.L.M.A) Institut de Biologie Structurale 41, rue Jules Horowitz 38027 GRENOBLE Cedex 1 Tel: +33 (0)438.78.95.93 ----------------------------------------------------------