Files in this Data Supplement:

• Supplemental file 1 - Supplemental text, legends to Fig. S1 to S5, and Table S1 (Primers used for quantitative RT-PCR).
  MS Word document, 51K.
• Supplemental file 2 - Fig. S1 (Sumo-1 and Sumo-2/3 mRNA levels in cultured wild-type and Sumo-1^–/– mouse embryo fibroblasts).
  Zipped MS PPT file, 26K.
• Supplemental file 3 - Fig. S2 (Hematoxylin and eosin staining of testis and ovary sections from wild-type and Sumo-1^–/– mice).
  Zipped MS PPT file, 1.7MB.
• Supplemental file 4 - Fig. S3 (Accumulation of Sumo-1, Sumo-2/3, Aos1, Uba2,and Ubc9 RNA transcripts during normal testicular development).
  Zipped MS PPT file, 134K.
• Supplemental file 5 - Fig. S4 (In situ hybridization analyses of Sumo-1, Sumo-2/3, Aos1, Uba2, and Ubc9 RNA transcripts in testis of wild-type adult mice).
  Zipped MS PPT file, 228K.
• Supplemental file 6 - Fig. S5 (Levels of RNA transcripts related to the sumoylation pathway in wild-type and Sumo-1^–/– mouse testis).
  MS PPT file, 54K.