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[ccp4bb]: twin refinement with arp/shelxl


I wish to  refine a merohedric twin to 2.0 A and, as usual, the model bias seems very difficult to get
rid of. I was wondering if someone has already tried to couple arp with shelxl, in order to try an
automatic way of refining the twin ratio and exclude the phase bias (the arp_shelxl script available
in the documentation was prepared for other purposes). Any hint is welcome. Thanks

Carlos Frazao
ITQB-UNL, Av Republica, Apartado 127, 2781-901-Oeiras, Portugal
Phone:  (351)-214469666    FAX:    (351)-214433644
e-mail: frazao@itqb.unl.pt