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Podcast: Mapping DNA at Near-Atomic Resolution with Cryo-EM

In this podcast, Berkeley Lab’s Eva Nogales describes how her team is using a new imaging technology that is yielding remarkably detailed 3-D models of complex biomolecules critical to DNA function. Using cryo-electron microscopy (cryo-EM), Nogales and her colleagues have resolved the structure at near-atomic resolutions of a human transcription factor used in gene expression and DNA repair.

Boosting Manycore Code Optimization Efforts with Roofline Technology

A software toolkit developed at Berkeley Lab to better understand supercomputer performance is now being used to boost application performance for researchers running codes at NERSC and other supercomputing facilities. “Since its initial development, what is now known as the Empirical Roofline Toolkit (ERT) has benefitted from contributions by several Berkeley Lab staff. Along the way, HPC users who write scientific applications for manycore systems have been able to apply the toolkit to their applications and see how changing parameters of their code can improve performance.”

Berkeley Lab Algorithm Boosts Resolution on Cryo–EM

Berkeley Lab researchers have developed the first 3-D atomic-scale model of P22 virus that identifies the protein interactions crucial for its stability. “This is a great example of how to exploit electron microscopy technology and combine it with new computational methods to determine a bacteriophage’s structure,” said Paul Adams, Berkeley Lab’s Molecular Biophysics & Integrated Bioimaging division director and a co-author of the paper. “We developed the algorithms—the computational code—to optimize the atomic model so that it best fit the experimental data.”