SnoRNA HBII - 13 is expressed mainly in the tissues of brain .
Is also in the lungs , the kidneys and muscle ; however HBII - 13 has no identified target RNA .
snoRNA HBII - 13 is expressed mainly in the tissues of brain , but is also in the lungs , the kidneys and muscle ; however HBII - 13 has no identified target RNA .