Hi all I have collected 2 datasets; one for the native proteins (2.3Å resolution) while other is for a protein-protein complex (3.5Å resolution). The unit cell parameters for the native are a=120, b=196, c=109, a=g=90, b=114, while for the complex data it is a=122, b=197, c=300, a=g=90, b=93. I have successfully got a MR solution and refined the native dataset with 3 monomers in the asymmetric unit. Analysis of the protein complex dataset shows 41% pseudo translation and so far there is no success in molecular replacement for this dataset. Can anyone please suggest me ways to solve this problem. i already have tried different templates like monomer, dimer, trimer, tetramer etc with truncations of loop region. i am using phaser, autoMR, molrep. Regards -- INTEKHAB ALAM LABORATORY OF STRUCTURAL BIOINFORMATICS KOREA UNIVERSITY, SEOUL