Prion
A Prion. It transmits a mis-folded protein state, and replicates by causing the host's proteins to replicate into its mis-folded pattern. Mad Cow disease is an example of a prion.
A prion is a small infectious particle that contains a misfolded protein. These contain no DNA or RNA. These cause Creutzfeldt-Jakob disease, Scrapie in sheep and Kuru. These are deadly and progressive nerve wasting diseases.A plant pathologist discovered an infectious RNA particle smaller than a virus that causes diseases in plants. He called it a viroid. Millions each year are lost by these viroids. These contain only RNA.These two are the smallest infectious particles. They are not called microorganisms because they are not alive any more than viruses are.
They don't quite 'reproduce', propagate would be closer to the mark. Prions are 'rogue' proteins, versions of naturally occurring proteins with a different 3D structure. They replicate in living host .
Prions are misfolded proteins and may form because of some misreading of the DNA code. Virions are extracellular state of a virus with nucleocapsid.
protein
A virus, a viroid or a prion
Yes. All viruses are composed of a nucleic acid surrounded by a protein capsid. When the capsid is not present, the the infectious nucleic acid is called viroid. When the nucleic acid is not present, the infectious protein coating is called prion.
An infectious agent consisting of a protein is a prion. This is a misfolded protein. It can cause several central nervous system diseases including Creutzfeldt-Jakob Disease, Fatal Familial Insomnia and Kuru in humans, Spongiform Encephalopathy in cows, mink, and cats plus Scrapie in sheep.A VIROID consists only of a minuscule circular RNA molecule, lacking the protein coat of a virus. Viroids appear to be transmitted mechanically from one cell to another through cellular debris. They infect only plants. Viroids are common plant pathogens which cause severe economic problems.A vector is something that carries something else. Like the bacteria on our hands or the ones on the feet of flies.A virus is much more complicated than the viroid or prion and has DNA or RNA (not both) as their genetic material with a protein coat surrounding them.
They are called Prion. This is the definition I fount at wordnetweb.princeton.edu/perl/webwn: "an infectious protein particle similar to a virus but lacking nucleic acid; thought to be the agent responsible for scrapie and other degenerative diseases of the nervous system".
Prion
An infectious agent consisting of a protein is a prion. This is a mis-folded protein. It can cause several central nervous system diseases including Creutzfeldt-Jakob Disease, Fatal Familial Insomnia and Kuru in humans. Spongiform Encephalopathy in cows, mink, and cats plus Scrapie in sheep.
A Prion. It transmits a mis-folded protein state, and replicates by causing the host's proteins to replicate into its mis-folded pattern. Mad Cow disease is an example of a prion.
It is caused by a prion. This an infectious protein not a virus.
there is no "protein in a prion", because prion is nothing but a protein. The gene sequence of this protein is just normal, with nothing special.
Infectious protein particles that cause kuru are passed directly to individuals through the ingestion of prion-infected tissue or when open sores on the recipient's skin are exposed to prion-infected tissue.
Infectious protein, also known as a prion, is best known as the cause of mad cow disease (which is technically called bovine spongiform encephalopathy). Scrapie, a disease of sheep, and kuru, a disease that affects cannibals, are also caused by prions.
A prion is a small infectious particle that contains a misfolded protein. These contain no DNA or RNA. These cause Creutzfeldt-Jakob disease, Scrapie in sheep and Kuru. These are deadly and progressive nerve wasting diseases.A plant pathologist discovered an infectious RNA particle smaller than a virus that causes diseases in plants. He called it a viroid. Millions each year are lost by these viroids. These contain only RNA.These two are the smallest infectious particles. They are not called microorganisms because they are not alive any more than viruses are.