<p>This is possibly a wild goose chase, but a lot of searching led me to this sample: </p>

<p><a href="https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSM2536852" rel="noreferrer">https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSM2536852</a></p>

<p>Which appears to exhibit accessions of the right format. This in turn leads to the platform:</p>

<p><a href="https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL22166" rel="noreferrer">https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL22166</a></p>

<p>Which is a custom spotted cDNA array, which the metadata seems to suggest is a human platform.</p>

<p>The full annotation table gives gene symbols and Entrez IDs for most of the probes on the array:</p>

<p><a href="https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?view=data&amp;acc=GPL22166&amp;id=53508&amp;db=GeoDb_blob144" rel="noreferrer">https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?view=data&amp;acc=GPL22166&amp;id=53508&amp;db=GeoDb_blob144</a></p>

<p>To take the example of the first line of your results:</p>

<pre><code>ID          ORF     Entrez gene SEQUENCE
SP_v2 4634  ETNK1   55500       AAAGCAGCTTCATCTTTCAAAATTGATTTGCTCTGGTTTT
</code></pre>

<p>The Entrez Gene record for that ID matches up:</p>

<p><a href="https://www.ncbi.nlm.nih.gov/gene/?term=55500" rel="noreferrer">https://www.ncbi.nlm.nih.gov/gene/?term=55500</a></p>

CC BY-SA 3.0
2017-07-27T12:27:29.010Z
2017-07-27T12:27:29.010Z
sjcockell
<p>I am a student trying to analyze GEO2r datas for one of my courses.
The IDs given in the output are different for different series. I need to convert all of them to a similar format.</p>

<p>In this process I encountered the following type of ID which I don't know its origin:</p>

<pre><code>”ID"    "logFC"
"SP_v2 4634"    "-0.9897758"
"SP_v2 3382"    "-0.8391782"
"SP_v2 4210"    "-1.1693583"
"SP_v2 2117"    "-1.0504727"
"SP_v2 3488"    "-0.9756444"
"SP_v2 1128"    "-0.8289103"
"SP_v2 2735"    "-0.8629999"
...
</code></pre>

<p>Each one of the rows represent a single gene.
My question is that what is this ID? The GEO accession is GSE97750.</p>

CC BY-SA 3.0
2017-07-27T11:40:43.293Z
Looks like some home made accession code, from which GEO set is it?
benn
CC BY-SA 3.0
2017-07-27T12:28:34.003Z
The GEO accession is GSE97750
hhoomn
CC BY-SA 3.0
2017-07-27T12:33:45.430Z
Yeah it is a custom array. Annotation can be found in the platform (GPL22166) data table. See answer by sjockell.
benn
<identifiers>
What database do gene IDs starting with sp_v2 refer to?
# What database do gene IDs starting with sp_v2 refer to?

(Asked by: username_0 on 2017-07-27)

I am a student trying to analyze GEO2r datas for one of my courses.
The IDs given in the output are different for different series. I need to convert all of them to a similar format.
In this process I encountered the following type of ID which I don't know its origin:
”ID"    "logFC"
"SP_v2 4634"    "-0.9897758"
"SP_v2 3382"    "-0.8391782"
"SP_v2 4210"    "-1.1693583"
"SP_v2 2117"    "-1.0504727"
"SP_v2 3488"    "-0.9756444"
"SP_v2 1128"    "-0.8289103"
"SP_v2 2735"    "-0.8629999"
...

Each one of the rows represent a single gene.
My question is that what is this ID? The GEO accession is GSE97750.

**Tags:** identifiers
> **Comments:**
> **username_1**: Looks like some home made accession code, from which GEO set is it?  
> **username_0**: The GEO accession is GSE97750  
> **username_1**: Yeah it is a custom array. Annotation can be found in the platform (GPL22166) data table. See answer by sjockell.  

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## 1 answers

### Answer by username_2 on 2017-07-27. Score: 5 | Accepted answer

This is possibly a wild goose chase, but a lot of searching led me to this sample: 
https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSM2536852
Which appears to exhibit accessions of the right format. This in turn leads to the platform:
https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL22166
Which is a custom spotted cDNA array, which the metadata seems to suggest is a human platform.
The full annotation table gives gene symbols and Entrez IDs for most of the probes on the array:
https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?view=data&acc=GPL22166&id=53508&db=GeoDb_blob144
To take the example of the first line of your results:
ID          ORF     Entrez gene SEQUENCE
SP_v2 4634  ETNK1   55500       AAAGCAGCTTCATCTTTCAAAATTGATTTGCTCTGGTTTT

The Entrez Gene record for that ID matches up:
https://www.ncbi.nlm.nih.gov/gene/?term=55500


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