There are over 30 proteins that can cause amyloidosis. However, two of them commonly impact the heart causing amyloid heart disease. 1. AL Amyloidosis or Light Chain Amyloidosis (AL): This is a bone marrow disease. Bone marrow has red blood cells and many types of white blood cells. White blood cells produce antibodies (proteins) to fight against infections. Light chains are pieces of antibodies produced by one type of white blood cell called plasma cells. In light chain amyloidosis, plasma cells start producing too much of abnormal light chains that do not function normally. These light