您好，Infliximab (anti-TNF-alpha)，货号I412009-1mg，网站页说到，储存缓冲液为Supplied as a 0.22 μm filtered solution in 100mM Pro-AC, 20mM Arg, pH 5.0。请问100mM Pro-AC是什么物质，Pro-AC是protein A和protein C吗？