How to find annotation file version from CDF file

Question

[kay]

Hello,

I have some .CEL files that were profiled on Affymetrix Human Genome Wide SNP 6.0 array. This was done a while back by some one else, I am trying to back track and find out what annotation file version was used.

There is a CDF File called GenomeWideSNP_6.Full.cdf. Is there a way to find out which version of annotation this CDF file contains?

I tried to read in the CDF into R (using the affxparser) but it crashes every time.

I also tried reading in the header of the CDF file, but that did not have any version information.

Any help on this will be useful.

Thanks!

Answer 1

[Maxime Lamontagne]

The CDF file is (probably) in binary. To read the CDF header, try this:

strings < GenomeWideSNP_6.Full.cdf > GenomeWideSNP_6.Full.txt
head GenomeWideSNP_6.Full.txt