Biochemical analysis of bovine T cell antigens with workshop monoclonal antibodies.
The relative molecular weight (Mr) of the CD1, CD2, CD4, CD5, CD6, CD8 and additional molecules identified by monoclonal antibodies (mAb) submitted to the workshop was determined using 125I surface-labelled leukocytes. Of 37 mAb precipitating lymphocyte surface molecules, 33 had Mr correlating with their clusters of differentiation. Further, we were able to determine Mr for three "undefined T lymphocyte" antibodies. Of the 20 mAb that did not precipitate a molecule from the surface of leukocytes, one was non-reactive as determined by flow microfluorimetry. The inability to precipitate a molecule from the remaining cells was probably due to lower affinities of those antibodies and conformational changes in the antigen(s) following lysis of the leukocytes.
O'Reilly
K L
KL
Department of Veterinary Science, University of Wisconsin-Madison 53706.
Eskra
L
L
Splitter
G A
GA
D000818:Animals; D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte / Q000737:chemistry*; D002417:Cattle / Q000276:immunology*; D004591:Electrophoresis, Polyacrylamide Gel; D008970:Molecular Weight; D011233:Precipitin Tests
D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte