This service makes extensive use of the CCP4 suite of programs and employs EPMR for optional molecular replacement. You therefore must have a valid CCP4 license (academic of commercial, depending on your affiliation) to use this service.

Using this service implies agreement to the following:

a) You do have a valid CCP4 license and AGREE THAT YOUR email (which you must provide to receive the results) is forwarded to the CCP4 administration in Daresbury, UK.

b) You agree to cite in published work (Click here to download the corresponding endnote library warp_server.enl) :

• the CCP4 suite of programs Collaborative Computational Project, Number 4. (1994). The CCP4 Suite: Programs for Protein Crystallography. Acta Cryst. D50, 760-763.


• EPMR (if applicable): Kissinger C.R., Gelhaar D.K, Fogel D.B. (1999). Acta Cryst. D55, 484-491.


• ARP (used as arp_waters in CCP4): Lamzin, V. S., Wilson, K. S. (1993). Automated refinement of protein models. Acta Cryst. D49, 129-147.


• REFMAC5: Murshudov G.N., Vagin A.A., E.J.Dodson (1997). Refinement of Macromolecular Structures by the Maximum-Likelihood Method. Acta Cryst. D53, 240-255.


• wARP (the idea): Perrakis A., Sixma T.K., Wilson K.S., Lamzin V.S. (1997). Acta Cryst. D53, 448-455.


• Real Space Correlation Coefficient plots: Bränden C.-I., Jones, TA. (1990). Between objectivity and subjectivity. Nature 343, 687-689.


• the paper describing this service (submitted).