W. A. ReidL. VongsorasakJ. SvastiM. J. VallerJ. KayGlasgow Royal InfirmaryMahidol UniversityUCL2018-10-122018-10-121984-06-01Cell and Tissue Research. Vol.236, No.3 (1984), 597-600143208780302766X2-s2.0-0021139715https://repository.li.mahidol.ac.th/handle/20.500.14594/30568On the basis of a) kinetic data obtained with a synthetic substrate and two peptide inhibitors and b) immunological cross-reactivity, it is shown that the aspartic proteinase of human seminal fluid is a gastricsin. The source of the precursor (progastricsin) in the male genital tract is identified to be the prostate. © 1984 Springer-Verlag.Mahidol UniversityBiochemistry, Genetics and Molecular BiologyMedicineArticleSCOPUS10.1007/BF00217228