Poly(A)+ RNA was isolated from brown adipose tissue of cold acclimated rats and a fraction enriched for uncoupling protein mRNA was used to generate a cDNA library in pBR 322, Immunological screening of 1,500 colonies with an affinity-purified antiserum against the uncoupling protein yielded five positive clones, pUCPratl–5. Clone pUCPrat2 encoded the C-terminal 54 amino acids of rat uncoupling protein and exhibited 90% amino acid homology with the hamster protein. Clones pUCPrat3–5 encoded only the C-terminal 11 amino acids suggesting that an antigenic determinant lies within this sequence.
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© 1986 Plenum Publishing Corporation
1986
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