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Microarray 244K- what does it mean - (May/20/2012 )

Hi all,

while going through literature, I noticed some data had mentioned the format of microarray is 244K.
Can anybody please tell me what 244k means. Is it something to do with clustering.

It will be a great help if anybody could clear my doubt. (i am not sure if this is the right forum to ask such question)



"This array contains 236,381 distinct biological 60-mer oligonucleotide probes, with 1,000 biological triplicates and 5,045 controls spanning coding and noncoding genomic sequences with median probe spacing of 7.4 and 16.5 kb, respectively."