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News & Updates Python 3 New Python 3 compatibility guide for scripts and plugins Official Release PyMOL v2.3 has been released on February 11, 2019. POSF New PyMOL fellows announced for 2018-2019 Tutorial Plugins Tutorial updated for PyQt5 New Plugin ProBiS H2O is a new plugin for identification of conserved waters in protein structures. Selection keywords New polymer.protein and polymer.nucleic selection keywords. Thanks everyone who participated in the poll! Plugin Update MOLE 2.5 is an updated version of channel analysis software in PyMOL New Script dssr_block is a wrapper for DSSR (3dna) and creates block-shaped nucleic acid cartoons Older News See Older News.

Did you know... Iterate The iterate command executes a Python expression for all atoms in a selection. The local namespace exposes all atomic identifiers and properties as read-only Python variables. The global namespace by default is the pymol module namespace, and thus exposes objects like cmd and stored. The order of iteration is that of the internal atom ordering. The alter command is equivalent to iterate, but provides read-write access to the exposed variables. This can for example be used to rename a chain or to assign new b-factors. If changing identifiers which would affect atom ordering, calling sort is necessary to reorder based on the new identifiers. The iterate_state command is similar to iterate, but iterates over the coordinates in the given state and selection, and exposes x, y, z in addition to the atomic identifiers and properties. The alter_state command is equivalent to iterate_state, but allows modification of x, y, z (and atom-state level ..→

A Random PyMOL-generated Cover. See Covers.