Trevigen offers a variety of counterstains for use in our TACS® assay kits. Nuclear Fast Red is the ideal counterstain for Trevigen kits employing the TACS Blue Label™ chromogenic substrate. Red Counterstain C provides an alternative for a red counterstain. Our Methyl Green stain provides an excellent contrast with DAB detection systems and is free of crystal violet contamination and Blue Counterstain, unlike Methyl Green, works well in neuronal tissue, and is also a good choice for double-labeling with brown or red detection systems.

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