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	<title>Ignore case chain - Revision history</title>
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	<updated>2026-05-14T22:03:17Z</updated>
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		<title>Cchem: 1 revision</title>
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		<updated>2017-12-11T04:50:14Z</updated>

		<summary type="html">&lt;p&gt;1 revision&lt;/p&gt;
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		<author><name>Cchem</name></author>
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	<entry>
		<id>https://wiki.pymol.org/index.php?title=Ignore_case_chain&amp;diff=14193&amp;oldid=prev</id>
		<title>Speleo3: created</title>
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		<updated>2017-11-27T17:37:00Z</updated>

		<summary type="html">&lt;p&gt;created&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;The [[ignore_case_chain]] setting (default: '''off''') controls whether the '''chain''' and '''segi''' [[Selection Algebra|selection operators]] are case sensitive. The default is to be case sensitive, so &amp;quot;chain A&amp;quot; is different from &amp;quot;chain a&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
''New In PyMOL 1.8.2 (see [[ignore_case]] for previous versions)''&lt;br /&gt;
&lt;br /&gt;
== Example ==&lt;br /&gt;
&lt;br /&gt;
The PDB structure '''3tcx''' has 28 chains, including &amp;quot;A&amp;quot; and &amp;quot;a&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
 PyMOL&amp;gt;fetch 3tcx, async=0&lt;br /&gt;
 PyMOL&amp;gt;count_atoms chain A&lt;br /&gt;
  count_atoms: 641 atoms&lt;br /&gt;
 PyMOL&amp;gt;set ignore_case_chain, on&lt;br /&gt;
 PyMOL&amp;gt;count_atoms chain A&lt;br /&gt;
  count_atoms: 1282 atoms&lt;br /&gt;
&lt;br /&gt;
== See Also ==&lt;br /&gt;
&lt;br /&gt;
* [[ignore_case]]&lt;br /&gt;
* [[Selection Algebra]]&lt;br /&gt;
&lt;br /&gt;
[[Category:Settings]]&lt;br /&gt;
[[Category:Selecting]]&lt;/div&gt;</summary>
		<author><name>Speleo3</name></author>
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