<prompt> Familial amyloidotic polyneuropathy is due to amyloidosis of nerves caused by deposition of ?Amyloid associated proteinMutant CalcitoninMutant TransthyretinNormal transthyretin  <response>: Ans. is c i.e., Mutant transthyretinTransthyretin ATTR amyloid Transthyretin TTR is normal serum protein that binds and transpo thyroxine and retinol.o TTR can cause following types of amyloidosis : ?1. Mutant TTR : - Mutation in TTR can cause syndrome of familial amyloidotic polyneuropathy or familial amylodotic cardiotnyopathy.2. Wild non-mutant TTR : - There is no mutation of TTR and wild type TTR forms fibrils which results in senile systemic amyloidosis senile cardiac amyloidosis. 