Immunohistochemistry, or immunolabeling, is a key method for the identification of protein expression and localization. Successful detection relies on a low signal-to-noise ratio, which is affected greatly by antibody specificity as well as the staining protocol. Immunohistochemistry in the mouse is challenging, particularly in adult skeletal tissue, due to the need for long decalcification, high autofluorescence and high levels of endogenous peroxidase. Here, we describe a highly sensitive protocol for protein detection in decalcified paraffin-embedded sections from adult mouse skeletal tissue. By using four levels of amplification, this method allows for the identification of even low-abundance proteins.
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