Primacell* 2 Rat Kidney FibrOut* 2 kit^ Kit, Primacell* 2 Rat Kidney FibrOut* 2: Fibroblast Inhibitory System (for 500 ml medium), A mixture of cis-OH-proline, ricin toxin, gentamycin and formulated serum substitutes, Stability/Storage: Stable at the room temperatures, stored at 4 to 8 deg C.