The Anti-HaloTag pAb is a purified rabbit polyclonal antibody raised against the HaloTag protein. The antibody is purified using Protein G affinity resin. The antibody detects HaloTag fusion proteins in Western blot hybridization and immunocytochemistry applications with high sensitivity and specificity. The HaloTag protein is not endogenous to mammalian, plant and E. coli cells. E. coli and mammalian cell extracts demonstrate low cross-reactivity with the Anti-HaloTag pAb.