Basiconic olfactory sensory neurons that ectopically express Or67dScer\UAS.cBa under the control of Scer\GAL4Or22a.7.717 in a Df(2L)dp-79b Dp(2;2)dppd21 background show spontaneous firing but do not respond to cis-vaccenyl acetate (cVA). Co-expression of SnmpScer\UAS.cBa in this background results in a significant response to cVA by these neurons.