I am doing IHC and I did not get any good signal on the positive control tissue. I am doing a few more tests, but was looking over the spec sheet and noticed it does say “binds selectively to BSA-conjugated Alginate and not to unconjugated BSA” – I am wondering if maybe the alginate that is secreted in their tissue is not BSA conjugated so maybe that is why it is not working. Could this be a error?