About the Cover
Cover picture: Gallery of electron micrographs of Drosophila 26S proteasomes with gold-labeled ubiquitin-aldehyde, a potent inhibitor of an intrinsic deubiquitylating activity. The averaged images map the corresponding subunit of the regulatory complex to the interface between the base and lid subcomplexes. See related article in this issue by Hölzl et al., 119-129.
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