A comparison of the plasminogen activator activity units of urinary-type plasminogen activator (u-PA) and tissue-type plasminogen activator (t-PA).

The earliest tissue plasminogen activator (t-PA) preparations prepared from melanoma cells were expressed in urinary-type plasminogen activator (u-PA) units of activity using the u-PA International Standard (66/46). This report describes a comparison between u-PA and t-PA units by various types of f