IlluminaHumanMethylation450k.db Bioconductor package

In order to do test analysis of DNA methylation data I need to cluster the data based on 27 markers described in Shen, 2007. Seven out of those markers are MINTs and I need to figure out what would be their most likely location on the 450k array. I will use Bioconductor IlluminaHumanMethylation450k.db package for annotation (i.e. chromosome and location of the probes) but some of the features are confusing. Here I test what each annotation feature in the package really means.

IlluminaHumanMethylation450kCHR3: What chromosome does the target sequence for a probe align to, in build 36

> x <- IlluminaHumanMethylation450kCHR36

> xx<-as.list(x)[1:3]

> xx

$cg00000029

[1] "16"

$cg00000108

[1] "3"

$cg00000109

[1] "3"