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. 1977 Dec;24(3):729–735. doi: 10.1128/jvi.24.3.729-735.1977

Binding characteristics of Rauscher leukemia virus envelope glycoprotein gp71 to murine lymphoid cells.

A K Fowler, D R Twardzik, C D Reed, O S Weislow, A Hellman
PMCID: PMC515994  PMID: 563478

Abstract

The major envelope glycoprotein (gp71) purified from Rauscher leukemia virus (R-MuLV) binds efficiently to murine lymphoid cells but not to either murine nonlymphoid cells or lymphoid cells from other species. Binding of 125I-labeled R-MuLV gp71 was competitively inhibited by unlabeled glycoprotein, as well as by whole R-MuLV, but not by murine xenotropic viruses, R-MuLV p30, and several unrelated proteins. Polyacrylamide gel electrophoresis profiles of iodinated gp71 after binding to lymphoid cells were similar to prebound profiles. Antibody to R-MuLV gp71 prevented binding, whereas normal serum had no effect. Adsorption of the glycoprotein to murine lymphoid cells occurs rapidly and is time and temperature dependent. The procedure described is sensitive for detecting the binding activity of approximately 10(4) cells. Binding was proportional up to 2.5 X 10(5) cells per ml and plateaued above 10(7) cells per ml. In the presence of excess R-MuLV gp71, BALB/c thymocytes bound approximately 2.4 X 10(4) molecules per cell.

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Selected References

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