The transgene contains the following elements: 13 kb sequence containing class I olfactory receptor olfactory sensory neuron (OSN) enhancer Rr323 (J element), the Or55b4 promoter sequence (~870 bp upstream of TSS plus ~40 bp of 5' UTR), sequence from the 5' end of the mouse Gap43 gene coding for the palmitoylation signal in-frame with the Venus fluorescent protein gene coding sequence, and poly(A) signal sequence. (J:254398)