1. Spermac stain analysis of human sperm acrosomes
Philip J Chan, Ph.D., Johannah U Corselli, Ph.D., John D Jacobson, M.D., William C Patton, M.D., Alan King, M.D. 
Fertility and Sterility 
Volume 72, Issue 1, Pages (July 1999)
DOI: /S (99)

2. FIGURE 1
Ejaculated sperm cells after staining with the Spermac acrosomal stain. Sperm with intact acrosomes have a dark green, “rubber-band,” semicircle cap line with red counterstained postacrosomal regions (left). Acrosome-reacted (center) and acrosome-defective (right) sperm do not have the continuous dark green band of even thickness at the acrosomal cap.
Fertility and Sterility  , DOI: ( /S (99) )