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A northern blot is a laboratory method used to detect specific RNA molecules among a mixture of RNA. Northern blotting can be used to analyze a sample of RNA from a particular tissue or cell type in order to measure the RNA expression of particular genes.
Northern Blot Analysis Northern hybridization (RNA blotting) allows us to identify the size and amount of a specific mRNA in a total RNA sample.This technique, in which a labeled probe is hybridized to homologous RNA sequences, is a powerful tool used in order to screen total RNA for the presence of a specific mRNA.orthern Blot Analysis Northern hybridization (RNA blotting) allows us to identify the size and amount of a specific mRNA in a total RNA sample.