May have a role in phototransduction; inhibits or prevents Ca(2+) induced stimulation of the trpl ion channel. [protein]-peptidylproline (omega=180) = [protein]-peptidylproline (omega=0) Interacts with inaD and trpl, and may be part of the inaD signaling complex. Expression in the embryo is limited to three tissues: lymph glands, Garland cells and oenocyte cells. Expressed both maternally and zygotically. First expressed at a high level in 0-2 hours embryos. Expression then gradually increases through the end of embryogenesis and laval development. Detected at lower levels in third-instar larvae and pupal stages. Expressed at a high level in adult females and at a lower level in adult males.