[phenixbb] Cutting out a fragment from cryoEM map

Hi, I want to build an RNA model using cryo-EM density. The structure is of a protein-RNA complex and the map consists regions with protein subunits. Is it possible to separate the portion of the map which represents the RNA only? Thanks and regards, Sunandan -- Sunandan Mukherjee (PhD) Research Assistant Laboratory of Bioinformatics and Protein Engineering International Institute of Molecular and Cell Biology (IIMCB) ul. Ks. Trojdena 4, 02-109 ​Warsaw, Poland