<p>If the tag <code>r</code> is incorrect, the easiest way is to download and install <code>PyMOL</code>: <a href="https://pymol.org/2/" rel="nofollow noreferrer">https://pymol.org/2/</a></p>
<p>Drap and drop your pdb file and type <code>remove not chain A</code>.
Then save molecule via the menu as pdb or type <code>save some_file_name.pdb</code> (will be in your home root folder).</p>

CC BY-SA 4.0
2020-08-13T10:21:58.927Z
Thank you for the help. Appreciate it.
ibio_rep1
CC BY-SA 4.0
2020-08-14T08:35:00.713Z
Hi @ibio_rep1 could you please upvote the answer (ok once yuo have sufficient rep) and if you feel it resolves your question mark it as 'accepted'. This is super important because otherwise it discourages answering new OPs.
M__
CC BY-SA 4.0
2020-08-13T10:00:05.577Z
2020-08-13T10:00:05.577Z
Matteo Ferla
<p>You can also do this with <a href="http://www.bonvinlab.org/pdb-tools/" rel="nofollow noreferrer">pdb-tools</a>:</p>
<pre><code>pdb_selchain -A prot.pdb &gt; prot_A.pdb
</code></pre>

CC BY-SA 4.0
2020-08-17T10:46:15.357Z
2020-08-17T10:46:15.357Z
jgreener
<p>We have a docking target protein with multiple chains (A,B and C). However, I just need chain A. How can I delete the 2 other chains from the docking target protein.</p>
<p><a href="https://i.sstatic.net/yOrFq.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/yOrFq.jpg" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/XmPcv.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/XmPcv.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2020-08-17T17:03:36.493Z
Hi @ibio_rep1, sorry to be persistent but please remember to accept one of the answers below. I didn't know about the pdb tools and its useful trick to know. It is important for the momentum of the site. Both respondees are serious structural bioinformaticians.
M__
<protein-structure>
Delete chains from a protein
# Delete chains from a protein

(Asked by: username_0 on 2020-08-12)

We have a docking target protein with multiple chains (A,B and C). However, I just need chain A. How can I delete the 2 other chains from the docking target protein.

[![enter image description here](https://i.sstatic.net/yOrFq.jpg)](https://i.sstatic.net/yOrFq.jpg)

[![enter image description here](https://i.sstatic.net/XmPcv.jpg)](https://i.sstatic.net/XmPcv.jpg)

**Tags:** protein-structure
> **Comments:**
> **username_1**: Hi @ibio_rep1, sorry to be persistent but please remember to accept one of the answers below. I didn't know about the pdb tools and its useful trick to know. It is important for the momentum of the site. Both respondees are serious structural bioinformaticians.  

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## 2 answers

### Answer by username_2 on 2020-08-13. Score: 2

If the tag `r` is incorrect, the easiest way is to download and install `PyMOL`: <https://pymol.org/2/>

Drap and drop your pdb file and type `remove not chain A`.
Then save molecule via the menu as pdb or type `save some_file_name.pdb` (will be in your home root folder).

> **Comments:**
> **username_0**: Thank you for the help. Appreciate it.  
> **username_1**: Hi @ibio_rep1 could you please upvote the answer (ok once yuo have sufficient rep) and if you feel it resolves your question mark it as 'accepted'. This is super important because otherwise it discourages answering new OPs.  

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### Answer by username_3 on 2020-08-17. Score: 1

You can also do this with pdb-tools:
pdb_selchain -A prot.pdb > prot_A.pdb


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