Gene expression profiles in lymphocytes. (A) cDNA microarray analyses⁴  on B cells isolated from peripheral blood lymphocytes. (B) Real-time reverse transcription-polymerase chain reaction (RT-PCR) analysis⁵ of HSP40 expression in lymphocytes obtained by CFL, DFL, and BC procedures. Data are mean ± SD of triplicates and numbers above the data bars represent fold differences relative to CFL values. ND indicates not done. (C) Correlation between copies of HSP40 mRNA measured in B cells of HIV-negative donors and volume of blood collected by CFL.