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Encoded by constitutively expressed housekeeping genes, 'loading control proteins' provide ideal use as a reference to evaluate the changes in expression levels of target proteins. For example, 'loading control antibodies' are often used in Western blots to correct sample loading errors and assist with protein quantification to ensure the accuracy and reliability of the results. abm offers a range of common "loading control antibodies", including Anti-GAPDH, Anti-β-Actin and Anti-α, β-Tubulin. Note that both monoclonal and polyclonal antibodies are available for use in applications such as Western blotting, ELISA and Immunofluorescence.