# Remove.group

**URL:** <https://forum.mothur.org/t/remove-group/2182>\
**Category:** Commands in mothur\
**Created:** [December 27, 2014, 12:29pm UTC](https://forum.mothur.org/t/remove-group/2182 "2014-12-27T12:29:58Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![shaniny](https://avatars.discourse-cdn.com/v4/letter/s/58956e/32.png) [@shaniny](https://forum.mothur.org/u/shaniny)\
**Post date:** [December 27, 2014, 12:29pm UTC](https://forum.mothur.org/t/remove-group/2182/1 "2014-12-27T12:29:58Z")

</div>

Hello,

I am a student in master Bio and I have a project carried out on an archaeal community with 454.  
My problems came from steps on chimeras.

mothur \> chimera.uchime(fasta=GQY1XT001.shhh.trim.unique.good.filter.unique.precluster.fasta, name=GQY1XT001.shhh.trim.unique.good.filter.unique.precluster.names, group=GQY1XT001.shhh.good.groups, processors=2)  
result : 00 :01 100.0% 0/73 chimeras found.

I do not know if my results are corect  
I use that commonde after:

mothur \> remove.lineage(fasta=GQY1XT001.shhh.trim.unique.good.filter.unique.precluster.pick.fasta, name=GQY1XT001.shhh.trim.unique.good.filter.unique.precluster.pick.names, group=GQY1XT001.shhh.good.pick.groups, taxonomy=GQY1XT001.shhh.trim.unique.good.filter.unique.precluster.pick.pds.wang.taxonomy, taxon=bacterria-unknown)

And later nothing more going, I have not found any contaminants.  
My Proffesor asked us to achieve remove.group control without the use of a MOCK file (that we do not have), except that no MOCK I do not advance, I’m completely block.  
If MOCK file is needed how to create it?

I really want to complete this project and see highlight the results obtained.

Can you help me please ???

---

<div class="post-metadata">

**Author:** ![pschloss](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.mothur.org/pschloss/32/4_2.png) [@pschloss](https://forum.mothur.org/u/pschloss)\
**Post date:** [January 3, 2015, 2:59am UTC](https://forum.mothur.org/t/remove-group/2182/2 "2015-01-03T02:59:43Z")

</div>

If you didn’t sequence a mock community with your samples, then you need to skip those steps. In the future, I’d strongly encourage you to sequence a mock community in parallel with your samples.

Pat