Rabbit IgG conjugated to tetramethylrhodamine (TMR, TRITC). Tetramethylrhodamine exhibits maximum absorption at 557 nm and maximum emission at 576 nm. Refrigerate for short term storage or keep frozen for long-term storage. Avoid repeated freeze/thaw cycles. Product is shipped FedEx overnight on ice packs within continental US. The first item is $30, additional items are shipped at no additional shipping costs.