analysis of cell surface gag expression with the 43-17 antibody leads us to propose that the l domain plays a crucial role in ( i ) the insertion and orientation of murine leukemia virus gag polyproteins in the cell membrane and ( ii ) the relative abundance of expression of akr leukemia virus versus moloney murine leukemia virus glycosylated gag polyproteins in infected cells .
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of cell surface
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cells