WB; IH,Frozen; IH(P), Paraffin Immunohistochemistry (IHC) and Western Blotting (WB). A concentration of 0.5-1.0 µg/mL is recommended for WB. Rat synaptophysin has a predicted length of 307 residues and a MW of 38 kDa. A concentration of 1.0-2.0 µg/mL is recommended to detect synaptophysin in formalin/acetone fixed tissues. Biosensis recommends optimal dilutions/concentrations should be determined by the end user.