Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
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A lock (
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information only on official, secure websites.
Schematic representation of envelope chimeras where multiple amphotropic and ecotropic domains were swapped. Domains derived from amphotropic MLV-4070A (white boxes) and ecotropic Moloney-MLV (MO) (black boxes) and sequences common to both MLV types (hatched boxes) are shown.
