Daughterless/Achaete-scute complex heterodimers act as transcriptional activators of neural cell fates and are involved in sex determination. Homodimer. Efficient DNA binding requires dimerization with another bHLH protein. Interacts with Amos. Interacts (via bHLH motif) with sisA and sc. Interacts with dpn (via bHLH motif). Ubiquitous.