the 800-bp CBh promoter we developed is a ubiquitous promoter that is advantageous overall, relative to the CMV and CBA promoters, in terms of the range of cell types transduced, the strength of expression, and the duration of expression.

Studies further report that the 229-bp MeP promoter fragment, when used in AAV vectors in the CNS, displays primarily low-level neuronal expression along with an advantageous small size

Thanks Mehdi! Your answer is helpful. I have two questions:

1) Do you know from where (which plasmid) can I get CBh promoter?

2) Is this promoter active only in neurons or oligodendrocytes as well?