Fig. 8. Model for the functions of JAK signaling in the ovaries. Anteroposterior patterning of the follicular epithelium is accomplished through a series of cell signaling events. Each event progressively defines somatic fates. The differentiation events are represented as a cascade with the signaling pathways involved in each step indicated in blue. A diagram of an ovariole is colored to indicate the somatic cell identities and is keyed to the fates indicated in the cascade. See text for details.