The expression levels of internal reference proteins and tagged proteins can provide a reference for changes in target protein expression levels, ensuring that any changes in target protein levels are due to differences in the samples and not caused by experimental procedures. Elabscience^® has compiled a selection of high-quality internal controls and tag antibodies for you. Commonly used cytoplasmic internal controls include GAPDH, β-Actin, and β-Tubulin, as well as conventional tag antibodies such as His tag, GFP tag, and GST tag. You can choose according to your needs and learn more about our products.