(A) Schematic of experimental timeline for TM induction, UGS isolation, kidney capsule transplantation and analysis of xenografted urogenital tissues. (B) Gross images of representative xenografts from UGS tissue isolated from R26mTmG/+: Hes1CreERT2/+ (B1) or R26mTmG/+: ArL/Y: Hes1CreERT2/+ (B2) mice. (C) Graphical representation of xenograft weight from different genotype mouse grafts as labeled above. Please also see Supplemental Table 4 in the Supplemental data file. (D) and (E) Representative H&E staining of tissue sections from xenografts of R26mTmG/+: Hes1CreERT2/+ or R26mTmG/+: ArL/Y: Hes1CreERT2/+ mice. Blue arrows indicate flattened epithelial cells. (F) Co-IF analyses of graft tissues of R26mTmG/+: Hes1CreERT2/+ with GFP and different antibodies, AR (F1), E-cadherin (F2), CK8 (F3) or CK5 (F4) in xenografts. (G) Similar Co-IF analyses with graft tissues of R26mTmG/+: ArL/Y: Hes1CreERT2/+ as described in (F). White arrows indicate AR-deleted flattened cells. (H) Quantification of AR and GFP co-expressing cells in xenografts from different genotype mouse tissues as indicated above. Please see Supplemental Table 5 in the Supplemental data file. (I) Quantification of PCNA and GFP co-expressing cells in xenografts from different genotype mouse tissues as indicated above. Please see Supplemental Table 6 in the Supplemental data file. Scale bars: 2mm (4B1–2); 50μm, or 10μm in magnified views (4D-E); 100 μm, or 25 μm in magnified views (4F-G). Results are mean +/− SD of at least three independent samples per group. *: P<0.05.