State Census Data Center - Demographic, social, economic, migration, and housing data from the decennial censuses, the American Community Survey, the Current Population Survey, and other special and periodic surveys.
Prions are a disease-causing form of a normal protein called cellular prion protein (PrPC) that is located primarily on the surface of central nervous system cells but also in other tissues of the body in mammals.
Prions are abnormal forms of the protein PrP; they transmit several diseases that affect neural tissues in animals and humans. Viroids differ from viruses in that they lack a protein coat; they are merely circular, single-stranded RNA fragments that replicate on their own inside plant cells.iroids do not cause disease processes in humans or animals; their effects are limited to plants. However, a similar infectious agent, a virusoid, causes type D hepatitis, an exceptionally virulent form of that disease.