the proteolytic enzyme produced by activation of plasminogen in serum. Plasmin belongs to the peptidases. It is mainly responsible for fibrin splitting in the blood.
https://de.wikipedia.org/wiki/Plasmin (Wikipedia CC-by-sa-3.0)
https://flexikon.doccheck.com/de/Plasmin (© Flexikon, courtesy of DocCheck Medical Services GmbH, Dr. Frank Antwerpes)