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Heterododecamer predicted for PDB entry 1crx (DNA-recombination synapse). The complex is made of four heterotrimers, each including a DNA fragment bound to bacteriophage recombinase Cre. It is the trimers, rather than the dodecamer, that are considered as the primary units here (Guo et al., 1997 ▶). See discussion in the text. The image was produced using the CCP4mg graphical viewer (Potterton et al., 2004 ▶).
