Enumeration of FKN gene–expressing cells in T-cell zones.

In in situ hybridization experiments, FKN gene–expressing cells were enumerated in T-cell zones of lymph nodes from HIV-infected and uninfected individuals (hatched and black columns, respectively). Results are expressed as the number of positive cells detected per 10 fields at the × 400 magnification. This corresponds to an average density of FKN gene–expressing cells of 294 ± 60/cm²and 48 ± 8/cm² in HIV-infected patients and controls, respectively.