Medicago AB Products Are Available Worldwide. For Research Use Only. One of the most commonly used biological buffers. Isotonic and non-toxic to cells. Medicago’s PBS is specifically developed for immunological and microbiological laboratories. It is provided in sealed pouches and as pre-weighed tablets in bottles or convenient blister packs. Thirteen standard-sized packages and volumes range from 100 mL to 100 L. References: 1. A peptide carrier for the delivery of biologically active proteins into mammalian cells. (2001) MC Morris, J Depollier, J Mery, F Heitz. Nature Biotechnology 19, 1173 – 1176.