FIGURE 5.

Expression of many IR tuning receptors depends on their IR co-receptor. (A) Heat map showing the average antennal expression in Log₂(RPM) for detected antennal IR genes at 7 DPE in WT, Ir76b¹, Ir25a², Ir25a²;Ir76b¹, and Ir8a¹ flies. The IR genes are grouped by their type: co-receptors, Ir25a- and Ir76b-dependent amine-sensitive tuning receptors, Ir8a-dependent acid-sensitive receptors, and Ir25a-dependent thermosensitive and/or hygrosensitive receptors. (B) The expression level in RPM for each exon of the Ir76b gene in WT flies and Ir76b¹ mutants. (C) Expression of amine-sensitive, acid-sensitive and thermo/hygrosensitive IR tuning receptors as a percentage of expression in WT flies in different IR co-receptor mutants.