Ubiquitin: A small but extremely important protein that acts the kiss of death to other proteins. Ubiquitin consists of only 76 amino acids.In the normal course of events, proteins are inactivated by the attachment of ubiquitin to them, a process called ubiquitination. Ubiquitin acts as a tag by which the protein-transport machinery ferries a protein to the proteasome for degradation.Antagonizing this process are enzymes that remove ubiquitin from proteins. Ubiquitin is appropriately named since it is ubiquitous and is present in virtually all types of cells.biquitin acts as a tag by which the protein-transport machinery ferries a protein to the proteasome for degradation. Antagonizing this process are enzymes that remove ubiquitin from proteins. Ubiquitin is appropriately named since it is ubiquitous and is present in virtually all types of cells.
Answer by Alex Hughes-Walton. Confidence votes 6. We have a Welshie/Jack Russell mix who is 15 and going strong, despite spending the first seven years of her life churning out pups in a notorious puppy mill. Aside from a few stray white hairs, she can still pass for half her age.She runs like a gazelle, dances, etc.nswer by Alex Hughes-Walton. Confidence votes 6. We have a Welshie/Jack Russell mix who is 15 and going strong, despite spending the first seven years of her life churning out pups in a notorious puppy mill. Aside from a few stray white hairs, she can still pass for half her age.
I know this because i had a cairn terrier cross and he died at 18 when there... show more I have a border collie cross and a Jack russel cross. If the two were pure breeds they would have an average life span of 13 or 14. know this because i had a cairn terrier cross and he died at 18 when there... show more I have a border collie cross and a Jack russel cross. If the two were pure breeds they would have an average life span of 13 or 14.