UCSF ChimeraX version 1.4 has been released! ChimeraX includes user documentation and is free for noncommercial use. Download for Windows, Linux, and MacOS from: https://www.rbvi.ucsf.edu/chimerax/ This will be the last release to support macOS 10.14 (Mojave). Also, ChimeraX 1.4 is not available for CentOS 7, Ubuntu 16.04 and 18.04 because the Qt 6 window toolkit does not support those older Linux distributions. Updates since version 1.3 (Dec 2021) include: - search/retrieve from EBI AlphaFold DB 3rd release, ~1 million structures - display AlphaFold predicted aligned error (PAE) plots - can BLAST UniRef100,90,50 (+ previous choices AlphaFold, PDB, NR) - AlphaFold prediction of multimers (of limited size) on Google Colab - independent centers of rotation available as mouse mode - join models with Build Structure tool or command - define axes for display and/or use in measurements - increase/decrease VDW radii relative to their current values - switch PDB residue numbering scheme (author/canonical/uniprot) - align sequences with Clustal Omega or MUSCLE - calculate % identity in sequence alignments - window toolkit updated to Qt 6.2.3 from 5.15.2 For details, please see the ChimeraX change log: https://www.rbvi.ucsf.edu/trac/ChimeraX/wiki/ChangeLog