As captive-bred food, " Drosophila " flies up to the fourth instar and subsequently " Tenebrio " mealworms of appropriate size, and for adults also small Orange-spotted Cockroaches ( " Blaptica dubia " ), were used with success.
12.
Other proteins that contain beta helices include the antifreeze proteins from the beetle " Tenebrio molitor " ( right-handed ) and from the spruce budworm, " Choristoneura fumiferana " ( left-handed ), where regularly spaced threonines on the ?-helices bind to the surface of ice crystals and inhibit their growth.
