Biotinylated dextran amines (BDA) are organic compounds used as anterograde and retrograde neuroanatomical tracers.
# The labeled samples are then mixed with a propriety hybridization solution which may contain SDS, SSC, dextran sulfate, a blocking agent (such as COT1 DNA, salmon sperm DNA, calf thymus DNA, PolyA or PolyT), Denhardt's solution and formamine.