In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
Q: Serum amyloid A ( SAA ) is a plasma protein which has been associated with several diseases , including amyloidosis , arthritis , and atherosclerosis , and its abnormal expression , particularly in nonhepatic cells , is implicated in the pathogenesis of these diseases .
A:
Serum amyloid A