Senile cardiac amyloid associated protein is

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 in the hea of aged individuals (senile systemic amyloidosis)Reference: Robbins and Cotran Pathologic Basis of Disease; 9th edition; Chapter 6; Diseases of the Immune System