A construct comprised of 154 base pairs upstream of the human OR8A1 transcription start site, which includes homeodomain and OLF/EBP binding sites, followed by 146 base pairs of the 5' nontranslated exon 1, followed by a LacZpA reporter was used for pronuclear microinjection to dissect promoter elements and found to express in the main olfactory epithelium of mice. (J:166885)