Project fruit fly: What accounts for insect taste?

A Johns Hopkins team has identified a protein in sensory cells on the "tongues" of fruit flies that allows them to detect a noxious chemical and, ultimately, influences their decision about what to eat and what to avoid.

Scientists sniff out the evolution of chemical nociception

Whenever you choke on acrid cigarette smoke, feel like you're burning up from a mouthful of wasabi-laced sushi, or cry while cutting raw onions and garlic, your response is being triggered by a primordial chemical sensor ...