Figure 3. Western blots of TRPM8 protein derived from expression in HEK-293 cell lines. TRPM8 protein samples were separated on a 10% SDS-PAGE and blotted on nitrocellulose membranes overnight in the presence of CAPS buffer (pH 11.1). Immunodetection was revealed by chemiluminescence. Lanes 1–3 probed with anti- Myc-IgG: Lane 1 – plasma membrane fractions of HEK-293 cells not expressing TRPM8; Lane 2 – plasma membrane extracts of cells stably expressing TRPM8; Lane 3 – TRPM8 protein purified on Sephacryl-300 gel-filtration chromatography. Lane 4 – Coomassie blue staining of purified TRPM8. Samples were heated for 5 min. at 70°C before loading.