secreted then degraded by endogenous proteases, because placental annexin 4 was not degraded when added to prostate fluid and incubated at 37°C. The collective concentrations of annexin 1 , des-( 1 -29)-annexin 1, and annexin 5 in prostate fluid and seminal plasma were 1.3% and 0.2% of the total protein, respectively. This is consistent with their secretion by the prostate and subsequent diluti...
