part of overlaps expresses esg adult adult specialized Malpighian tubule cell somatic stem cell adult stem cell zone of Malpighian tubule Malpighian tubule tiny cell adult renal stem cell 2014-04-22T19:02:41Z adult RSC adult Malpighian tubule tiny cell Can be identified by expression of escargot (Singh et al., 2007; Wang and Spradling, 2020). fly_anatomy.ontology FBbt:00110862 adult RNSC Stem cell of the adult Malpighian tubule (Singh et al., 2007). These are small cells occupying a basal position and are only found in the lower tubule and ureter (stem cell zone) (Singh et al., 2007; Wang and Spradling, 2020). They are usually quiescent, but can generate replacement principal cells in response to injury (Wang and Spradling, 2020). Within the stem cell zone, they are more numerous than type I (principal) cells (Wang and Spradling, 2020).