Sterile ROTI ® Stock 10x PBS 10x conc., BioScience Grade, ready-to-use, sterile filtered 10fold stock solution phosphate buffered saline, pH 7,4. Very versatile standard solution for detection systems in protein biochemistry, cytological stainings and molecular biological assays. Directions for use 1 x PBS is, for instance, used as basic solution for Western-Blot analyses, ELISAs and other enzymatic assays, for solving and dilution of proteins, for immunocytological and immunohistological assays, as well as for in situ hybridisations, apoptosis detection systems and staining of nuclei.