Fig. 1From: The association of gr/gr deletion in the Y chromosome and impaired spermatogenesis in Bulgarian males: a pilot studyGel electrophoresis for detection of gr/gr deletion. Lane 1, no template control; lane 2, female patient; lanes 3–7, 9, and 10, normal genotype; lane 8, deletion of both markers; lane 11, no sY1291 marker detected, which indicates a gr/gr deletion; M, 1 kb DNA ladderBack to article page