I will like to know if there is a company/homemade alternative to the duo link PLA kit antibody diluent, since this reagent finishes faster than the rest of the reagent provided in the kit.
Yes, the homemade antibody diluent recipe is suitable for proximity ligation assay; however, you need to do some "homework" (e.g., do some preliminary work, such dilutions to find a good ab concentration) before you do your assays.