EnVision™ FLEX+, Mouse, High pH is a very-high-sensitivity visualization system intended for use in immunohistochemistry together with Dako Autostainer Instruments. The EnVision™ FLEX+ Mouse (LINKER) amplifies the signal of primary mouse antibodies and the reaction is visualized by DAB+ Chromogen. In addition to the EnVision™ FLEX+ Mouse (LINKER) the convenience kit includes Peroxidase-Blocking Reagent, EnVision™/HRP, DAB+ Chromogen, Substrate Buffer, Target Retrieval Solution, High pH (50x Tris/EDTA buffer, pH 9), and Wash Buffer (20x). The EnVision™ FLEX+ Rabbit (LINKER), Code K8019, is an optional EnVision™ FLEX reagent that may be used with EnVision™ FLEX and FLEX+ convenience kits to amplify the signal of primary rabbit antibodies. EnVision™ FLEX+ convenience kits are compatible with all optional EnVision™ FLEX and FLEX+ reagents for Dako Autostainer Instruments.