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The Drosophila lymph gland is a well-characterized hematopoietic organ in which a population of multipotent stem-like progenitors is maintained by a combination of signals from different cellular populations within the organ. The lymph gland serves as an ideal model both for the interrogation of signaling mechanisms involved in progenitor maintenance as well as a tool for the identification of novel...
Cellular microenvironments established by the spatial and temporal expression of specific signaling molecules are critical for both the maintenance and lineage-specific differentiation of progenitor cells. In Drosophila, a population of hematopoietic progenitors, or prohemocytes, within the larval lymph gland [1] gives rise to three mature cell types: plasmatocytes, lamellocytes, and crystal cells...
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