ERVW-1 and infection: The four envelope glycoproteins tested here were isolated longitudinally from A141, a SHIVSF162P4-infected macaque that developed moderate breadth [38]: d56 B3, an early variant isolated 56 days post-infection (dpi); d417 D15 and d487 A6-1, two intermediate clones isolated 417 and 487 dpi; and d670 A8-9 a late variant isolated 670 dpi.