Viral proteins from HIV-1 MN exhibit protein aggregates for gp41 and p24 proteins, but not for surface protein gp120, after treatment with aryl azides + UVA for 15 minutes when analyzed by Western blot for the protein of interest. Lanes: A) HIV, B) HIV + UV, C) HIV + UV + DAN, D), HIV + UV + INA. Westerns are immunostained for the proteins, as labeled; gp41, p24, gp120.(Belanger et al., 2010)