PREPARATION OF GENOMIC DNA FOR MICROARRAY-BASED COMPARATIVE GENOME HYBRIDIZATION
2006
Genome-wide assessment of DNA gains and losses can be accomplished by comparative hybridization using a variety of microarray platforms that employ oligo, cDNA, BAC and other sequences as probes. Here we describe the preparation of genomic DNA for hybridization to a set of chicken cDNA probes spotted on glass slide microarrays. Method 1 can be used to assess DNA copy-number differences between two genomes, typically an experimental genome and a normal, diploid genome. We then present a specialized application of array CGH for detecting DNA amplifications containing long, inverted repeat structures (palindromes). Method 2 describes the procedure for palindrome enrichment and the internal controls used to distinguish direct versus inverted, long repeat structures using the cDNA microarray platform.
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