Complex sentence: The 66 kDa protein in oats was visualized by 28 out of 33 sera (84%), however, there was evident non-specific binding to this region and thus it may also represent lectin-like binding.
Split into simpler sentences: The 66 kDa protein in oats was visualized by 28 out of 33 sera (84%). However, there was evident non-specific binding to this region and thus it may also represent lectin-like binding.