Since multiple epitopes are targeted, there is a higher likelihood of detection of the target Identifies the entire target protein via binding at multiple sites. Identifies whether a particular region of a protein is present Varying specificities to multiple epitopes. Monoclonal v Polyclonal Antibodies Comparison In contrast, monoclonal antibodies bind to a single epitope within a target antigen. Polyclonals are usually produced in rabbits, donkeys, sheep, and goats, and are purified from serum. Polyclonal antibodies consist of a mixed pool of immunoglobulin molecules that bind to several different epitopes found on a single antigen. In addition, they are developed against the host species of the primary antibody, such that a primary antibody raised in goat will require an anti-goat secondary antibody raised in a species other than goat. Secondary antibodies are developed against the Fc portion of a purified primary antibody, and are often conjugated for antigen detection purposes. For antigen detection, primary antibodies can be conjugated to reporter enzymes or fluorophores, which facilitates quantification or analysis of antigen expression.Ĭonjugated primary antibodies often eliminate the need for secondary antibodies however certain experimental conditions may require their use. Primary antibodies are predominantly used in immunoassays such as ELISA, western blot, immunohistochemistry, chromatin immunoprecipitation (ChIP), or flow cytometry. They can be either monoclonal antibodies, which bind to a specific epitope, or polyclonal antibodies that bind to several epitopes of an antigen. This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide ( ab234957).Primary antibodies directly bind specific antigens with high specificity and affinity. The pCALM3_2 vector used to generate R-loops was kindly provided by Prof. Prior treatment with RNase A (digests single stranded RNA) does not affect the IP signal whereas prior treatment with RNase H (digests RNA in DNA-RNA hybrids) eliminates the signal. ab234957 immunoprecipitates R-loops in the presence or absence of prior digestion by ApaLI, which does not affect R-loop structure. Lane 8: ab234957 with R-Loop ApaLI (RNase A+H treated)īlocking buffer and concentration: 7.5 µg ssDNA.ĭiluting buffer and concentration: PBS containing 0.1% Triton X-100.Ī synthetic vector (pCALM3_2) was used to generate R-loops. Lane 7: ab234957 with R-Loop(RNase A+H treated) Lane 6: ab234957 with R-Loop(RNase A treated) Lane 5: ab234957 with R-Loop ApaLI (RNase A treated) Maxpar ® is a trademark of Fluidigm Canada Inc.ĭNA-RNA hybrid Immunoprecipitation (DRIP) data using ab234957. This product is compatible with the Maxpar ® Antibody Labeling Kit from Fluidigm, without the need for antibody preparation.

Use our conjugation kits for antibody conjugates that are ready-to-use in as little as 20 minutes with <1 minute hands-on-time and 100% antibody recovery: available for fluorescent dyes, HRP, biotin and gold.

mass cytometry) and Multiplex Imaging applications. This conjugation-ready format is designed for use with fluorochromes, metal isotopes, oligonucleotides, and enzymes, which makes them ideal for antibody labelling, functional and cell-based assays, flow-based assays (e.g. The carrier-free buffer and high concentration allow for increased conjugation efficiency. If you require a custom buffer formulation or conjugation for your experiments, please contact carrier-free antibodies are typically supplied in a PBS-only formulation, purified and free of BSA, sodium azide and glycerol. This antibody clone is manufactured by Abcam. Our DNA-RNA immunoprecipitation (DRIP) protocol is linked here.Īb256361 is the carrier-free version of ab234957. Transcription by T7 RNA polymerase does not allow R-loop formation. Transcription by T3 RNA polymerase leads to R-loop formation. The pCALM3_2 plasmid carries a 789bp fragment of the human CALM3 region that forms R-loops (PubMed ID: 31053798) cloned between T3 and T7 RNA polymerase promoter sequences. The pCALM3_2 vector used to generate R-loops was kindly provided by Prof.

S9.6 antibody cross reactivity