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Fig. 6. Cyclic AMP synthesis in glycerol-treated and intact sperm. Sperm cAMP
levels were measured 15 s after suspending intact and glycerol-treated sperm
into various solutions. Glycerol-treated sperm were diluted in 100 mmol
l1 KCl, 100 mmol l1 NaCl and 300 mmol
l1 KCl solutions. Intact sperm were diluted in 100 mmol
l1 NaCl and KCl solutions. Gray bars, percentage motility of
intact sperm; black bars, glycerol-treated sperm. Values are means ±
S.D. (N=3).