Wc. Davis et al., IDENTIFICATION OF A MONOCLONAL-ANTIBODY REACTIVE WITH THE BOVINE ORTHOLOGUE OF CD3 (BOCD3), Veterinary immunology and immunopathology, 39(1-3), 1993, pp. 85-91
A monoclonal antibody (mAb), MM1A, that identifies a molecule expresse
d on a large percentage of bovine lymphocytes (60-80%) was examined to
determine its specificity. Two and three colour immunofluorescence an
alysis using flow cytometry revealed the molecule is highly expressed
on all CD4+ and CD8+ lymphocytes and lymphocytes that express WC1 and
the gamma/delta TCR. In contrast to mAbs reactive with BoCD5, MM1A did
not react with B lymphocytes. Biochemical analysis revealed that the
mAb immunoprecipitates a molecular complex comprising a set of peptide
s with M(r) approximately 12, 16, 22, 32, 36, and 44 kDa under reducin
g conditio ns and an additional 96 kDa peptide complex under non-reduc
ing conditions. The data indicate that MM1A recognizes the bovine orth
ologue of CD3 (BoCD3).