<prompt> Senile cardiac amyloid associated protein isTransthyretinANPBeta 2 microglobulinGelsolin  <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 in the hea of aged individuals senile systemic amyloidosisReference: Robbins and Cotran Pathologic Basis of Disease; 9th edition; Chapter 6; Diseases of the Immune System 