Abstract

CD34 is a leukocyte antigen that is expressed in various cell types including hematopoietic cells. Monoclonal antibodies against human, murine, and canine CD34 proteins have been used for the identification of lymphohematopoietic stem/progenitor cells. The cDNA encoding bovine CD34 was cloned, and its nucleotide sequence was determined. The identity of the deduced amino acid sequence of the encoded protein to those of human, murine. and canine CD34 proteins was 61.1%, 56.0%, and 66.1%, respectively. Northern blot hybridization with the cDNA as a probe detected CD34 RNA expression in the cerebrum, spleen, heart, and lung of a fetal calf.

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