We have observed that nonderivatized C-60 (buckminsterfullerene) could
inhibit the replication of simian immunodeficiency virus (SIV) in vit
ro and the activity of Moloney murine leukemia virus (M-MuLV) reverse
transcriptase (RT) (IC50 approximate to 3 mu M). This means that biolo
gical effects are exerted via a direct and active interaction of the C
-60 Skeleton with other macromolecules.