Abstract
The standardFISH uses DNA probes to hybridize to the designated complementary strands. This is DNA-DNA interaction, and it usually takes much longer time to obtain detectable signals compared to other reactions such as immunochemical reactions and simple chemical reactions. Certain proteins bind to specific DNA sequences and regulate the biological function of DNA. These DNA-binding proteins have specific domains to interact with single- or double-stranded DNA. Some of telomere proteins apparently bind to telomere sequence and form nucleoprotein complex to protect chromosome ends. Using telomere PNA probes, probes can be accumulated at the telomere sites in a non-hybridization manner. This chapter introduces nontraditional PNA telomere staining protocol without DNA-DNA hybridization to visualize telomere locations on metaphase chromosomes.
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