gene chip

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An immobilized oligonucleotide array used to screen an RNA sample (after reverse transcription) to determine which genes are being expressed. The oligonucleotides may be specific probes for known genes (e.g. G-protein-coupled receptors) or a random set of defined sequences where the genes will be unknown but the pattern of hybridization is indicative of the expression profile.

Subjects: Medicine and Health.

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