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http://www.youtube.com/watch?v=_yuFOX0hj7Iendofvid
[starttext]prostatic secretions vary among species. They are generally composed of simple sugars and are often slightly alkaline.  In human prostatic secretions, the protein content is less than 1% and includes proteolytic enzymes, prostatic acid phosphatase, and prostate-specific antigen. The secretions also contain zinc with a concentration 500-1,000 times the concentration in blood.[endtext]