AAV with eSYN promoter driven hChR2(C128S/D156A)-mCitrine
This AAV expresses hChR2(C128S/D156A)-mCitrine driven by a neuron eSYN promoter.
The eSYN is a hybrid promoter consisting of a 0.4Kb CMV enhancer (E) and the 0.45Kb human Synapsin I promoter fragment (hSYN1). eSYN hybrid promoter gives about 2-4 fold higher expression than that of the parental hSYN1 promoter. However, the neuronal specificity of eSYN is slightly decreased, compared to that of the parental hSYN1 promoter.
hChR2 is a humanized version of ChR2 for mammalian expression. Wild-type ChR2, as well as a few of its mutations, provides the fastest excitation of the channelrhodopsins offered, and is widely used in in optogenetics techniques in neuroscience. hChR2(D156) mutant is another SFO mutation with a 6.9-minute open-state lifetime, and hChR2(C128S/D156A) double mutation creates a Stabilized Step Function Opsin (SSFO) with a stability of the active state up to 30 minutes.
Ready-to-use AAV expressing hChR2(C128S/D156A)-mCitrine driven by a neuron eSYN promoter. Available in AAV1, AAV2, AAV5, AAV6, AAV8, AAV9, AAV-DJ and other serotypes.