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Activation of the zymogen form of prostate-specific antigen by human glandular kallikrein 2

Prostate-specific antigen (PSA) and human glandular kallikrein 2 (hK2) are glandular kallikreins secreted by the prostate gland. Both enzymes are synthesized with a propeptide that is supposedly cleaved off in the prostate to yield the mature forms found in semen. We have purified and characterised recombinant PSA and hK2 produced in eucaryotic cells. Recombinant PSA was recovered as a zymogen and

Multi theoretical perspectives in an abductive action research study

This paper describes an ongoing abductive research process with two researchers, with different educational background, involved in the same action research, thus having different theoretical perspectives on the study. The method of involving two researchers in the same study is not main stream in action research. The empirical data is analysed based on the two research perspectives and on paralle

Distribution and tissue expression of semenogelin I and II in man as demonstrated by in situ hybridization and immunocytochemistry

Semenogelin I and II (Sgl, Sgll) are two separate gene products of chromosome 20 with extensive (80%) identity in primary structure. They are mainly responsible for immediate gel formation of freshly ejaculated semen. Degradation of Sgl and Sgll is due to the proteolytic action of prostate-specific antigen (PSA); it results within 5-15 minutes in liquefaction of semen and release of progressively