hauberk (plural hauberks) A coat of mail; especially, the long coat of mail of the European Middle Ages, as contrasted with the habergeon, which is shorter and sometimes sleeveless. 1786, Francis Grose, A Treatise on Ancient Armour and Weapons, page 14: The hauberk was a complete covering of mail from head to foot. It consisted of a hood, joined to a jacket with sleeves, breeches, stockings and shoes of double chain mail, to which were added gauntlets of the same construction.
1 Exons are expressing sequences within a pre-mRNA molecule that are spliced together once introns are removed to form mature mRNA molecules that are translated into proteins.  Alternative splicing allows for the production of various protein isoforms from one single gene coding.
nuclear primary transcript that is processed by modification and splicing to give rise to mRNA. Introns are removed from pre-mRNA, which utilizes transesterification reactions to accomplish this. heterogeneous nuclear RNA (hnRNA) RNA that comprises transcripts of nuclear genes made by RNA polymerase II.