BIOL 483 Lecture Notes - Lecture 82: Base Pair, Mecha, Table Tennis

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Transcripts are greater than 200 nucleotides in length, contrast to short rnas in next section that are 20-25 nucleotides. Can act in cis (specific to allele it was produced from eg. xist) and in trans (act on other alleles o molecules eg. hotair) Beneifts of lncrna is high degree of specificity since you have long regions of nucleotides that base pair with target seq. No translation -> no protein, faster than protein regulation. Serve as scaffold fro chromatin regulator - like sirna amplification cycles. Signal for activation or repression of protein complexes (eg. prc2) Can modulate 3d structure loops (eg erna - enhancer rna, and xist rna where there"s long range loops) For females we have 2 x chromosomes so females are mosaic so which x chromosome is inactivated occurs on cell to cell bias. Occurs in xic where inactivation spreads in cis from centre.

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