Radio ▁stations ▁established ▁in ▁ 1 9 9 0 ▁Category : Bl ount ▁County , ▁Tennessee ▁Category : M id west ▁Communic ations ▁radio ▁stations <0x0A> </s> ▁Ch âteau ▁de ▁la ▁Val ade ▁is ▁a ▁château ▁in ▁Bour de illes , ▁D ord ogne , ▁Nouvelle - A qu itaine , ▁France . ▁ ▁References ▁ ▁Further ▁reading ▁ ▁Guy ▁P ena ud , ▁D iction naire ▁des ▁ch âte aux ▁du ▁P ér ig ord , ▁p .   2 8 4 , ▁éditions ▁Sud ▁O uest , ▁ 1 9 9 6 ▁▁ ▁Category : Ch âte aux ▁in ▁D ord ogne <0x0A> </s> ▁s no R NA ▁U 4 6 ▁( also ▁known ▁as ▁SN ORD 4 6 ) ▁ ▁is ▁a ▁non - c oding ▁R NA ▁( nc R NA ) ▁mole c ule ▁which ▁functions ▁in ▁the ▁modification ▁of ▁other ▁small ▁nuclear ▁R N As ▁( sn R N As ). ▁This ▁type ▁of ▁modifying ▁R NA ▁is ▁usually ▁located ▁in ▁the ▁nucle ol us ▁of ▁the ▁e uk ary otic ▁cell ▁which ▁is ▁a ▁major ▁site ▁of ▁sn R NA ▁bi ogen esis . ▁It ▁is ▁known ▁as ▁a ▁small ▁nucle olar ▁R NA ▁( s no R NA ) ▁and ▁also ▁often ▁referred ▁to ▁as ▁a ▁guide ▁R NA . ▁ ▁s no R NA ▁U 4 6 ▁belongs ▁to ▁the ▁C / D ▁box ▁class ▁of ▁s no R N As ▁which ▁contain ▁the ▁conser ved ▁sequence ▁mot ifs ▁known ▁as ▁the ▁C ▁box