The diseases are now thought to be due to rogue proteins known as prions.
If someone has high levels of the protein, known as troponin I, they are more likely to have suffered heart damage.
Cells receive information from their neighbors through a class of proteins known as receptors.
But it is the first protein known to associate directly with huntingtin.
The tests detect proteins known as antibodies that develop to fight off infection.
When this protein known as "myelin" is compromised physical and mental impairments can result.
The process is named after a small protein known as ubiquitin.
They belong to a larger family of proteins known as lipocalins.
The protein, also known as C14orf42, is an enzyme with thioesterase activity.
Cats have saliva that contains a protein known to cause allergy.