Transcriptional repressor that suppresses transcription from the FASLG, FOXO3 and FOXO4 promoters. May have a role in the organization of the testicular vasculature. Expressed in the testis in Sertoli and periendothelial cells at 14 dpc. Accumulation of blood in the central part of the fetal testis. Increased ectopic apoptosis in periendothelial cells of the testis.