Rabbits were immunized with MASMTGGQQMG (T7 epitope) conjugated to KLH. After multiple immunizations in Freund's adjuvant, serum was collected. Antibodies were immunoaffinity-purified using the peptide conjugated to a solid-phase support. Specification: The affinity-purified antibodies were analyzed using ELISA and Western blot analyses. The anti-T7 diluted 1:35,000 gave an OD = 1.0 in a 15 minute reaction against peptide conjugated with a different carrier than was used for purification. HRP-conjugated donkey anti-rabbit IgG was used and TMB was the substrate.