Fig. 2: Screening of D. busckii antenna reveals 11 basiconic sensillum classes with Bab2B OSN type narrowly tuned to oligosulfides.
a Representative traces of an extracellular recording from the Bab2 sensillum class. Responses to mineral oil (control) and DMDS (10−4 in mineral oil) are shown. b Tuning width of the Bab2B OSN class. The OSN type is narrowly tuned to DMDS. c The dose–response properties of the Bab2B OSN indicate high sensitivity to DMDS. n = 5. d Responses of the Bab2B OSN type to stimulation with 10−3 v/v of linear, short-chain oligosulfides. n = 6. Each replicate corresponds to a single Bab2B OSN recording from an individual fly. (one-way ANOVA with multiple comparisons, *p < 0.05, ns p > 0.05). Error bars represent mean ± SD. e Screening of all known basiconic types in Dmel and Dbus with DMDS (10−4 in mineral oil) revealed DMDS detection predominantly by the Bab2B OSN class in Dbus. A comparable response was not observed at this concentration from D. melanogaster OSNs. f Heatmap representation of SSR data (represented as spikes/s) for recordings from Bab2-like sensilla in the posterior-proximal region of the antenna of multiple Drosophila species. n = 3–5. g Representative SSR traces of homologous OSNs responding to DMDS (10−3 v/v) when tested across multiple Drosophila species. Source data are provided as a source data file.
