FIG. 2.
Protein production by new HIV-2 deletion mutants. COS-1 cells transfected with proviral clones were metabolically labeled with [35S]methionine, and viral proteins were immunoprecipitated with pooled HIV-2-positive patient sera. Proteins from cellular and virion fractions were visualized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autoradiography. Lanes: M, protein from mock-transfected cells; 1, pSVR; 2, pSVRΨ1; 3, pSVRDM; 4, pSVRDM/Ψ1. gp, glycoprotein; pr, protein; MA, matrix; Env, envelope; Gag, group antigen; SU, surface; TM, transmembrane.