May bind to and transport cholesterol and may play a role in ecdysteroid biosynthesis. Expressed in larval prothoracic gland cells (at protein level). Detected in larval ring gland, imaginal disk and salivary gland and in adult head, ovary and testis. Expressed in nurse cells of stage 10 egg chambers in 2-day-old adult ovary. No expression detected in adult brain. Expressed in the embryo from stage 16. In the larva, abundant at the end of both the second and third instar but is almost undetectable in freshly hatched third instar larvae and declines in white prepupae. Also expressed in the adult.