TY - RPRT TI - Improvement of cryo-EM maps by density modification AU - Terwilliger, Thomas C. AU - Ludtke, Steven J. AU - Read, Randy J. AU - Adams, Paul D. AU - Afonine, Pavel V. PY - 2020 DO - 10.1038/s41592-020-0914-9 UR - https://www.osti.gov/biblio/1699460 ID - 1699460 ER -