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News & Updates
Official Release PyMOL v2.4 has been released on May 20, 2020.
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...

Get chains

This command will return a python list of chains for the given selection.

Proteins structures often have more than one chain of residues present in a structure file. This command will fetch the names of each chain present. Because of the lack of standards, sometimes chain A will also be blank "". This isn't a problem for PyMOL, but be warned sometimes you may get back, [""].

Syntax

# using get_chains for the object or selection called objSel
get_chains objSel

Examples

# examples
fetch 1cll
print "1CLL has the following chains:", cmd.get_chains("1cll")

# list all chains in all proteins loaded in PyMOL:
for x in cmd.get_names():
  for ch in cmd.get_chains(x):
    print x, " has chain ", ch

See Also

Get_Names

A Random PyMOL-generated Cover. See Covers.