c[G(2′,5′)p-2′-[sCya5]-AHC-A(3′,5′)p]

Fluorescently labelled version of the metazoan cyclic dinucleotide second messenger and STING activator c[G(2′,5′)pA(3′,5′)p] (aka cGAMP(2′-5′) or 2’3′-cGAMP, Cat. No. C 161), fluorescent with λexc 644 nm and λem 664 nm. c[G(2′,5′)pA(3′,5′)p] was found to be the metazoan second messenger produced by the mammalian innate immune DNA sensor cGAMP synthase (cGAS).