Dictionary » H » Hnrna




The abbreviated form for heterogeneous nuclear ribonucleic acid: an extrachromosomal RNA molecule in the nucleus that serve as primary transcript from DNA.


The hnRNA is the collective term for the unprocessed mRNA molecules in the nucleus. It is largely comprised of the pre-mRNA molecules that require extensive processing to become mature mRNA molecules. Although the hnRNA serve as precursor of mRNA, not all hnRNA become cytoplasmic mRNA.

See also: pre-RNA

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Chromosome contains RNA,but What role It plays?

I know theres portion of human DNA in chromosome, but I do not know much about hnRNA, im sure it contain in nucleus, but I cannot recall if its from choromosomes.

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by sunghoo
Sun Mar 28, 2010 7:27 pm
Forum: Molecular Biology
Topic: Chromosome contains RNA,but What role It plays?
Replies: 9
Views: 5990


I don't know what dictionary you got that from, but not ours. Here is what our dictionary says: "The process by which introns are removed from hnRNA to produce mature messenger RNA that contains only exons. Alternative splicing seems to occur in many proteins and by alternative exon usage a ...

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by MrMistery
Wed Jul 23, 2008 11:25 am
Forum: Genetics
Topic: genes
Replies: 5
Views: 2698

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