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.
The intervening sequences that are removed are called introns. The process by which introns are removed is referred to as splicing. The sequences remaining after the splicing are called exons. All of the different major types of RNA in a eukaryotic cell can have introns.Although most higher eukaryotic genes have introns, some do not.he process by which introns are removed is referred to as splicing. The sequences remaining after the splicing are called exons. All of the different major types of RNA in a eukaryotic cell can have introns.