Deletion region (authors’ own work based on Paihoux et al., 2001); a: the PIS deletion with a marked LINE (in dark grey), repeated elements in the central part of the palindrome (in red), and the elements stabilizing the hairpin and binding to SRY (in black); b: the structure of the hairpin regulatory element; c: the PIS deletion with insertion regions identified in the present study in sex-reversed individuals (in grey).