<prompt> Which type of amyloidosis is caused by mutations in transthyretin gene?Familial Mediterranean feverFamilial amyloidosis polyneuropathyDialysis associated amyloidosisPrion protein associated amyloidosis  <response>: Transthyretin TTR is a normal serum protein that binds and transpos thyroxine and retinol. Several distinct mutant forms of TTR and its fragments are deposited in a group of genetically determined disorders referred to as familial amyloid polyneuropathies. Normal TTR is also deposited Due to overproduction in the hea of aged individuals senile systemic amyloidosis. 