I think even frozen the proteins can degrade. It is not like freezing the blood will stop all chemical reactions--it just slows chemical processes down without

I think even frozen the proteins can degrade. It is not like freezing the blood will stop all chemical reactions--it just slows chemical processes down without halting the chemical processes. There's a reason the blood is no longer considered useful. To be honest, I am not an expert in this, but I'm sure the proteins are degrading too