Complex sentence: In immunohistochemical techniques, there are several steps prior to the final staining of the tissue antigen, which can cause a variety of problems including strong background staining, weak target antigen staining, and autofluorescence.
Split into simpler sentences: In immunohistochemical techniques, there are several steps prior to the final staining of the tissue antigen, and many potential problems affect the outcome of the procedure. The major problem areas in IHC staining include strong background staining, weak target antigen staining and autofluorescence.