Profile: Fluorochrome, LLC. produces fluoro gold, antibody to fluoro gold and fluoro ruby. Our fluoro gold is effective for tracing neuronal retrograde. It is flexible for post-injection survival times. It is used to increase concentration range, for tissue treatment and compatible for other histochemical techniques. Our antibody to fluoro gold can be used by injecting it by using pressure and by iontophoretic application. The usage of anti body to fluoro is not the same as fluoro gold.