Molecular and fluorescence in situ hybridization characterization of the breakpoints in 46 large supernumerary marker 15 chromosomes reveals an unexpected level of complexity.

Abstract excerpt

Supernumerary marker chromosomes (SMCs) of chromosome 15, designated "SMC(15)s," are the most common SMC in humans, accounting for as much as 60% of all those observed. We report the characterization of 46 large SMC(15)s, using both fluorescence in situ hybridization and polymerase chain reaction analysis within and distal to the Prader-Willi/Angelman syndrome critical region (PWACR). Our aim was to establish...

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