Probing DNA polymerase alpha with monoclonal antibodies.

FEBS letters (1987), Volume 212, Page 259

Abstract:

DNA polymerase alpha was purified from human KB cells by immunoaffinity chromatography. Enzyme activity was inhibited by three different monoclonal antibodies (SJK-132, SJK-211, SJK-287). Kinetic analysis showed that each antibody neutralized polymerase activity by a different mechanism. SJK-132 was competitive with DNA indicating it interacts with the DNA binding domain of the polymerase. SJK-287 showed a biphasic response to dCTP suggesting two dCTP binding sites exist on polymerase alpha. SJK-211 was non-competitive with DNA, dCTP and dATP.

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