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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: Prostate. 2011 Dec 28;72(11):1233–1238. doi: 10.1002/pros.22474

Fig. 3.

Fig. 3

Purity of PSA preparations by silver stained gel analysis. PSA from eachvendor was assayed for purity by polyacrylamide gel electrophoresis. Briefly, 400 ng of PSA was separated on a 4–15% minigel (Bio-Rad) then fixed and silver stained according to the manufacturers instructions(Pierce).