May play an important role in honeybee nutrition. It is found in the royal jelly which is the food of the queen honey bee larva. The royal jelly determines the development of the young larvae and is responsible for the high reproductive ability of the honeybee queen. Hypopharyngeal glands of nurse honey bees. Produced by the cephalic glandular system of the nurse honey bee. Belongs to the major royal jelly protein family.