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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Alkaline phosphatase in hematopoietic tumor cell lines of the mouse: high activity in cells of the B lymphoid lineage.

Alkaline phosphatase (EC 3.1.3.1) was assayed in a large number of cultured mouse tumor cell line using p-nitrophenylphosphate as the substrate. Of 19 lines of the B lymphoid lineage, including Abelson pre-B, B lymphoma, and plasma cell tumor lines, all but 1 had substantial activity averaging 407 nmol/min/ mg protein (with a range from 5 to 900). Nine T lymphoid and 9 nonlymphoid hematopoietic lines examined had low activity of 0.7 to 4.2 nmol/min/ mg protein. The enzyme was markedly enriched in plasma membrane preparations from the B lymphoid cells, but not in those from most T lymphoma cells. The activity of another plasma-membrane-bound enzyme, gamma-glutamyl transferase, did not vary systematically with the type of cell line but was exceptionally high in 1 T lymphoma line. Investigation of pH dependence and susceptibility to inhibition by L-phenylalanine and L-homoarginine indicated similarity of the alkaline phosphatase from B cell lines to the enzyme recoverable from normal mouse kidney, placenta, bone marrow, and lymphoid organs. The enzyme seems to provide a useful marker for tumor lines of the B lymphoid lineage and for their plasma membranes.[1]

References

  1. Alkaline phosphatase in hematopoietic tumor cell lines of the mouse: high activity in cells of the B lymphoid lineage. Culvenor, J.G., Harris, A.W., Mandel, T.E., Whitelaw, A., Ferber, E. J. Immunol. (1981) [Pubmed]
 
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