Immunoblot analysis of 14-3-3 proteins in prostate cancer cell lines PC3, DU145, LNCaP and Tramp-C1. Equal amounts of total cellular protein lysates extracted from each of the cell lines were electrophoresed on SDS-PAGE, subjected to immunoblot with anti-14-3-3β, anti-14-3-3ξ, anti-14-3-3ε, anti-14-3-3σ, and anti-GAPDH antibodies, and followed by chemiluminescence detection. GAPDH was used as a loading control.