Anti-UCP-3 antibody is suitable for use in immunohistochemistry (formalin-fixed, paraffin-embedded sections at 1:3,000 dilution, using protease-digested sections of human and mouse skeletal muscle). The antibody may also be used in immunoblot (approx. 34 kDa, additional weak bands may be detected in some preparations of brown adipose tissue extracts) and western blot (at 1:1,000 dilution, extract of E. coli expressing UCP3).