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FEBS Lett. 1990 Feb 26;261(2):247-52.

Monoclonal antibodies to lipocortin-1 as probes for biological function.

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Biogen Inc., Cambridge, MA 02142.


We have developed two monoclonal antibodies to human lipocortin-1 (103 and 105) as reagents for quantitating the protein in biological systems and neutralizing its activity. Lipo 105 is a high affinity antibody that is functional in ELISA and Western blot formats. The antibody recognizes a site between amino acids 30 and 55 in the lipocortin-1 sequence and can be used on native or denatured protein. Lipo 103 is an antibody that neutralizes the phospholipase A2 inhibitory activity of lipocortin-1 by blocking binding of the protein to phospholipid surfaces. The antibody is specific for native human lipocortin-1. Lipo 103 was recently shown to block lipocortin-1-dependent differentiation of a squamous carcinoma cell line, demonstrating its usefulness as a probe for function.

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