Abstract:
:Murine monoclonal antibodies (MoAbs) were produced against the blood group KEL1 glycoprotein (93 kD component) immunopurified from human erythrocytes. One monoclonal antibody, 5A11 (IgGa, kappa), detects by immunoblotting a 93 and 184 kD component from KEL: 1,-2 or KEL: -1,2 red cell membrane preparations, separated by SDS polyacrylamide gel electrophoresis (PAGE) under non-reducing conditions. The 184 kD component was not detected under reducing conditions, suggesting that it represented a dimer of the 93 kD KEL glycoprotein. Neither the 93 nor the 184 kD could be detected from K0 or McLeod erythrocyte membrane preparations, indicating that the monoclonal antibody reacts with the KEL glycoprotein previously identified as a 93 kD species. Since this antibody does not agglutinate native or protease-treated erythrocytes, it is likely that it reacts with the cytoplasmic domain of the KEL glycoprotein. This was also substantiated by showing that 5A11 could immunoprecipitate the 93 kD component from intact membranes and inside-out vesicles but not from right-side-out vesicles. Immunostaining of membrane proteins prepared from human blood cells (platelets, lymphocytes, monocytes and granulocytes) and non-human erythrocytes revealed that the 93 kD molecule was only present on human red cells. Several other murine monoclonal antibodies obtained from the same fusion experiment gave identical results, but competition analyses on immunoblots indicated that these antibodies reacted with distinct epitopes on the KEL glycoprotein.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Jaber A,Loirat MJ,Willem C,Bloy C,Cartron JP,Blanchard Ddoi
10.1111/j.1365-2141.1991.tb04539.xsubject
Has Abstractpub_date
1991-10-01 00:00:00pages
311-5issue
2eissn
0007-1048issn
1365-2141journal_volume
79pub_type
杂志文章abstract::The translocation t(14;18) and its t(2;18) and t(18,22) variants, which involve the BCL2 genetic hallmark for follicular lymphoma (FL), have been reported in several cases of chronic B-cell lymphoproliferative disease (CLPD) and frequently in chronic lymphocytic leukaemia (CLL). We describe here the clinical, morpholo...
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